Basic Math Questions and Answers

Solve the radical equation. Check all proposed √2x+5=x-5 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The solution set is (Use a comma to separate answers as needed. Simplify your answer.) OB. The solution set is the empty set.

The 1906 San Francisco earthquake had a magnitude of 7.9 on the MMS scale. Around the same time there was an earthquake in South America with magnitude 4.9 that caused only minor damage. How many times more intense was the earth movement in San Francisco earthquake than the South American one?

Sherrie takes 35/6 hours to clean a pool; Jose takes 2 5/9 hours. Calculate the time difference in hours. Express your answer in mixed number form, and reduce if possible.

You give up a full-time salary of $52,000 a year to go to school for 2 years. The total cost of going to school is $36,000. If you want to be able to recover your investment in 4 years or less, what is the minimum salary you would need to earn upon earning your degree?

Solve the linear inequality. When the solution is other than Ø, use interval notation to express the solution set and graph the solution set on a number line. 5(x+1)+124x + 7 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The solution is (Type the solution using interval notation.) OB. The solution set is Ø. ***

Use graphs to find the set. (-5,0) U[-1,3] Select the correct choice below and fill in any answer boxes within your choice. OA. The set is (Type your answer in interval notation.) OB. The answer is the empty set.

Other than Ø, use interval notation to express the solution set and graph each solution set on a number line. 2(8-5x)>30-3x Select the correct answer below and, if necessary, fill in the answer box to complete your choice. O A. The solution set expressed in interval notation is (Simplify your answer. Use integers or fractions for any numbers in the expression.) OB. The solution set is Ø. www

Solve the compound inequality. -8≤x-4< -1 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The solution set is OB. The solution set is the empty set. (Type your answer in interval notation.)

A wooden artifact from an ancient tomb contains 40 percent of the carbon-14 that is present in living trees. How long ago, to the nearest year, was the artifact made? (The half-life of carbon-14 is 5730 years.) years.

A construction worker, 24 feet up on a scaffold, lifts a 4-lb rope hand over hand up to the scaffold to raise a cement block weighing 6 pounds off the ground. (Assume the rope is 24 feet long.) How much work (in ft-lbs) is required to pull the rope and the block up to the scaffold?

A physics class has 40 students. Of these, 14 students are physics majors and 18 students are female. Of the physics majors, four are female. Find the probability that a randomly selected student is female or a physics major. - The probability that a randomly selected student is female or a physics major is www..

Any of the following may contribute to over- training, with the exception of which? A. Training too intensely. B. Training with supervision. C. Training too much. D. Training too quickly.

If you see an argument getting out of control and heading towards violence, you should leave and notify someone asap. Who would be the best people to notify? A. the relations of those involved B. people in positions of responsibility C. the first peers you see

Some healthcare products are advertised to be effective without much behind them, which makes them questionable. A. money B. guarantee C. scientific research

At the beginning of an experiment, a scientist has 268 grams of radioactive goo. After 210 minutes, her sample has decayed to 4.1875 grams. What is the half-life of the goo in minutes? Find a formula for G(t), the amount of goo remaining at time t. G(t) = How many grams of goo will remain after 47 minutes?

Living in a large city which has bad air quality from pollutants can negatively affect your health. A. environmental B. social C. emotional D. spiritual

Use the basic proportion P/10 - A/B to solve the following problem for the unknown quantity. Round your answer to the nearest hundredth, if necessary.

A tractor pull contest is held at a county fair. The tractors in the contest pull a sled on which two more people get on every 10 feet. The force function to move the sled feet is given by F(x) = 400x + 1500 lbs. How much work (in ft-lb) is required to pull the sled 50 feet?

The half-life of Palladium-100 is 4 days. After 20 days a sample of Palladium-100 has been reduced to a mass of 5 mg. What was the initial mass (in mg) of the sample? What is the mass 7 weeks after the start?

What term describes when there is an increase, often sudden, in the number of cases of a disease above what is normally expected in a population? A. endemic B. anemic C. pandemic D. epidemic

Solve the equation using the quadratic formula. 2x²2² =2x+3 *w*** Score: 0 of 1 Next Question The solution set is . (Simplify your answer. Type an exact answer, using radicals and i as needed. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.)

If you hear someone joking about suicide, A. change the subject B. take it seriously C. laugh along to lighten the mood

A is a set amount of money that you pay systematically in order to receive a certain amount of health insurance. A. deductible B. premium C. tax credit

Change the fraction to decimal form rounded to the nearest thousandth, if necessary. 1 20

Suppose the null hypothesis is rejected. State the conclusion based on the results of the test. Three years ago, the mean price of a single-family home was $243,719. A real estate broker believes that the mean price has increased since then. Which of the following is the correct conclusion? OA. There is not sufficient evidence to conclude that the mean price of a single-family home has not changed. B. There is sufficient evidence to conclude that the mean price of a single-family home has not changed. C. There is not sufficient evidence to conclude that the mean price of a single-family home has increased. D. There is sufficient evidence to conclude that the mean price of a single-family home has increased.

Norepinephrine and dopamine are two different chemicals that are found mainly in which part of the body? A. the lungs B. the stomach C. the brain

Which disease of the respiratory system is a bacterial infection that is very resistant to antibiotics and mainly happens in people whose immune systems do not work well? A. tuberculosis B. asthma C. pneumonia

A company that has 250 employees chooses a committee of 14 to represent employee retirement issues. When the committee is formed, none of the 56 minority employees are selected. (a) Use technology to find the number of ways 14 employees can be chosen from 250. (b) Use technology to find the number of ways 14 employees can be chosen from 194 nonminorities. (c) What is the probability that the committee contains no minorities when the committee is chosen randomly (without bias)? (d) Does your answer to (c) indicate that the committee selection is biased? Explain your reasoning. (a) There are (Use scientific (b) There are (Use scientific ***** ways to choose 14 employees from 250 employees. notation. Round to two decimal places as needed. Use the multiplication symbol in the math palette as needed.) ways to choose 14 employees from 194 nonminorities. notation. Round to two decimal places as needed. Use the multiplication symbol in the math palette as needed.)

A bathtub contained 45 gallons of water when the plug was pulled. Six minutes later, 36 gallons of water remained in the tub. Assume the bathtub drained at a constant rate (in gallons per minute). a) Determine the equation of the linear relation (in slope-intercept form) with x = the # of minutes from when the plug was pulled, and y = the # of gallons of water in the bathtub. Sketch the graph. b) What do the slope and the y-intercept of your line indicate? c)Use your equation to determine how much water the bathtub contain 20 minutes after the plug was pulled. d) Use your equation to determine how long after the plug was pulled the bathtub was empty.

What type of therapy is hoping to be able to replace or insert genetic material to help change people's genetic make-up? A. gene therapy B. radiation therapy C. chemotherapy

State the conclusion based on the results of the test. According to the report, the standard deviation of monthly cell phone bills was $48.38 three years ago. A researcher suspects that the standard deviation of monthly cell phone bills is less today. The null hypothesis is rejected. Choose the correct answer below. OA. There is not sufficient evidence to conclude that the standard deviation of monthly cell phone bills is less than its level three years ago of $48.38. B. There is sufficient evidence to conclude that the standard deviation of monthly cell phone bills is different from its level three years ago of $48.38. C. There is sufficient evidence to conclude that the standard deviation of monthly cell phone bills is less than its level three years ago of $48.38.

When choosing a doctor, you should remember to consider his/her and try to find a doctor you will feel comfortable around. A. bedside manner B. salary requirements C. age or length of practice

Our immune system is comprised of a set of of different specialties with skills that do what against foreign invaders? "soldiers" specialized A. meet and greets B. teach them how to do things C. attack, identify, and kill D. lock them up

A 400-lb cable is 250 feet long and hangs vertically from the top of a building. How much work is required to pull the cable to the top of the building?

Would expect distributions of these variables to be uniform, unimodal, or bimodal? Symmetric or skewed? Explain. a. The number of speeding tickets each student in the senior class of a college has ever had b. Players' scores (numbers of strokes) at the U.S. Open golf tournament in a given year. c. Weights of female babies born in a particular hospital over the course of a year d. The length of the average hair on the heads of students in a large class

Question 5 T of 23 Step 1 of 1 Use the basic proportion necessary. P 100 = to solve the following problem for the unknown quantity. Round your answer to the nearest hundredth, if What is 54% of 353? Kaupad

In a survey of a group of men, the heights in the 20-29 age group were normally distributed, with a mean of 69.4 inches and a standard deviation of 2.0 inches. A study participant is randomly selected. Complete parts (a) through (d) below. ▪▪▪▪▪ The probability that the study participant selected at random is less than 67 inches tall is (b) Find the probability that a study participant has a height that is between 67 and 71 inches. The probability that the study participant selected at random is between 67 and 71 inches tall is. (Round to four decimal places as needed.) (c) Find the probability that a study participant has a height that is more than 71 inches. The probability that the study participant selected at random is more than 71 inches tall is. (Round to four decimal places as needed.) (d) Identify any unusual events. Explain your reasoning. Choose the correct answer below. (Round to four decimal places as needed.) OA. The events in parts (a) and (c) are unusual because its probabilities are less than 0.05. OB. The event in part (a) is unusual because its probability is less than 0.05. OC. There are no unusual events because all the probabilities are greater than 0.05. OD. The events in parts (a), (b), and (c) are unusual because all of their probabilities are less than 0.05.

Question 3 - of 23 Step The distance to your sister's house is 370 miles, and the distance to Denver is 777 miles. If it took 10 hours to drive to your sister's house, how long would you estimate the drive to Denver to take? Answer How to enter your answer (opens in new window) 2 Points hours Keypad Keyboard Shortcuts

Out of the following, which would be considered the most severe type of fracture? A. open fracture B. closed fracture C. partial fracture

A student is attempting to model x² + 2x + 1 using algebra tiles. Which of the following would not be a possible error in the student's thinking? a) Student incorrectly thinks both factors must include (2x + 1). b) Student doesn't realize model must match x²+2x+1. c) Student does not know what rectangular and small square tiles represent. d) Student knows factors are (x+1)(x+1). e) Student does not know how to represent expressions using algebra tiles

3. Consider a vector v where | v | = 5 and v makes an angle of 75° above the negative x-axis. a. Draw a sketch of v, clearly labeling its magnitude and its angle with the horizontal on your sketch. b. Draw the components of v on your sketch. c. Find and label the length of each component of v.

Your body would be an independent, chaotic system if you did not have talk with other organs. A. hormones B. blood cells C. nutrients to

The responses of a sample of 5252 shoppers who were asked how their purchases are made are shown in the table. Find the mean, the median, and the mode of the data, if possible. If any measure cannot be found or does not represent the center of the data, explain why. Does the mean represent the center of the data? Choose the correct answer below. OA. The mean represents the center of the data set. B. The mean does not represent the center because it is the least data entry. OC. The mean does not represent the center because it is the greatest data entry. OD. The mean does not represent the center because it is not a data entry. OE. The data set does not have a mean. ***** your choice How Purchases Are Made Research online and in store, buy in store Search and buy online Search and buy in store Research online and in store, buy online Frequency, f 2267 1121 1050 814

If you make the right choices regarding your you will have good health. A. lifestyle B. friends C. bone structure

A class has 25 students. In how many different ways can four students form a group for an activity? (Assume the order of the students is not important.) There are different ways that the four students can form a group for an activity. (Type a whole number.)

A deli makes sandwiches to order. A customer can choose ham, turkey, or roast beef, and have it served on white, wheat, or rye bread. They can also choose mustard, mayonnaise, ketchup, or hot sauce. How many different sandwiches of one meat, one bread, and one condiment can a customer order? 28 36 32 45

What percentage of the sun's energy actually strikes the earth? A. less than 1% B. approximately 10% C. approximately 50% D. 99.9%

How can hitting someone on the back help them recover from choking? A. It keeps them from passing out. B. The rhythm helps them remain calm and not panic. C. The force can help dislodge the object in their windpipe.

Use the basic proportion P/ 100 =A/B to solve the following problem for the unknown quantity. Round your answer to the nearest hundredth, if necessary. B What is 108 % of 561?

A road running north to south crosses a road going east to west at a point P. One car is driving north along the first road and a second car is driving east along the second road. Assuming they avoid a collision, both cars leave point P at the same time. If the first car is driving at a speed of 45 mph and the second car is driving at a speed of 60 mph, at what rate (in mph) is the distance between the cars increasing two hours later?