Math Questions

The specific gravity of a substance is the ratio of its density to the density of water. If the density of a steel alloy is 492 lb/ft³ and that of water is 62.4 lb/ft³, what is the specific gravity of the steel alloy?

Which property justifies rewriting the equation 1.6+ z = 8 as 1+ z = 8 A Additive Identity Property B Multiplicative Identity Property C Multiplicative Inverse Property D Substitution

Q. You are driving to a conference in Cleveland and have already traveled 100 miles. You still have 50 more miles to go. When you arrive in Cleveland, how many miles will you have driven? A. 50 miles B. 150 miles C. 1200 miles D. 1500 miles

Angela took a general aptitude test and scored in the 81st percentile for aptitude in accounting. (a) What percentage of the scores were at or below her score? (b) What percentage were above?

Given the function g(x) y, which of the following statements is true? g(x) is the name of the function, is the dependent variable, and y is the independent variable. g is the name of the function, a is the dependent variable, and y is the independent variable. g(x) is the name of the function, is the input variable, and y is the output variable. g is the name of the function, is the input variable, and y is the output variable.

Write a program that uses a two-dimensional array to store the highest and lowest temperatures for each month of the year. The program should output the average high, average low, and the highest and lowest temperatures for the year. Your program must consist of the following functions: 1. Function getData: This function reads and stores data in the two-dimensional array. 2. Function averageHigh: This function calculates and returns the aver- age high temperature for the year. 3. Function averageLow: This function calculates and returns the average low temperature for the year. 4. Function indexHighTemp: This function returns the index of the highest high temperature in the array. 5. Function indexLowTemp: This function returns the index of the lowest low temperature in the array. These functions must all have the appropriate parameters.

Solve the differential equation, such that the equation passes through the given point (x, y). (Remember to use absolute values where appropriate.) dy/dx = 5/x (1, 2) y = log(x5) +2

Find the area of a triangle whose two sides are 12 inches and 14 inches long, and has a perimeter of 34 inches. A. 23.24 in² B. 24.74 in² C. 47.91 in² D. 79.84 in²

Tonya has a small picture with a length of 4^(4/5) inches. She wants to enlarge the picture by a factor of 7 and frame it. Which of the following is true? O A. The enlarged picture has a length of 28^(4/5) inches. O B. The enlarged picture has a length of 33^(3/5) inches. O C. The enlarged picture has a length of 6^(1/5) inches. O D. The enlarged picture has a length of 18^(1/7) inches.

The mathematics department of a college has 12 male professors, 15 female professors, 9 male teaching assistants, and 10 female teaching assistants. If a person is selected at random from the group, find the probability that the selected person is a teaching assistant or a female. The probability is (Type an integer or a fraction. Simplify your answer.)

Mika can eat 21 hot dogs in 6 minutes. She wants to know how many minutes (m) it would take her to eat 35 hot dogs if she can keep up the same pace. How many minutes would Mika need to eat 35 hot dogs?

Identify the transformations. Sketch a graph of the following functions as a transformation of the graph of a toolkit function by first graphing the toolkit function, then the progression of transformations (in the correct order). f(x) = -3(-x - 5)² + 4

A car salesman is offered a choice between a weekly salary of $160 and a commission of $140 on each car, or no salary and a commission of $180 on each car. How many cars would he have to sell in one week to make the same money under both plans?

Express the confidence interval (0.065,0.109) in the form of p-E <p<p+E. <p< (Type integers or decimals.)

Write an equation of the line that passes through (-1,1) and is parallel to the line defined by 4x+y=5. Write the answer in slope-intercept form (if possible)band in standard form (Ax+By=C) with smallest integer coefficients. Use the "Cannot be written" button, if applicable. The equation of the line in slope-intercept form:

Identify the equation of the circle that has its center at (9, 12) and passes through the origin. A. (x +9)2 + (y + 12)² = 225 B. (x-9)2 + (- 12)² = 225 c. (x-9)2 + (-12)² = 15 D. (x + 9)2 + (y + 12)² = 15

Use the Monotonicity Theorem to find the intervals where the given function is increasing and where it is decreasing f(x)=9x+9 Select the correct choice below and, if necessary, fill in the answer box within your choice. A. The function is increasing on B. The function is not increasing on any interval (Type your answer in interval notation.)

3(x-3)=11-5(3x + 1) Select the correct choice below and, if necessary, fill in the answer box. A. The solution is (Type an integer or a simplified fraction.) B. The solution set is (-∞,∞). C. There is no solution.

Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 16.4 years and a standard deviation of 2.1 years. Find the probability that a randomly selected quartz time piece will have a replacement time less than 12.4 years? P(X< 12.4 years) = Enter your answer accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted. If the company wants to provide a warranty so that only 2.9% of the quartz time pieces will be replaced before the warranty expires, what is the time length of the warranty? warranty _____ years Enter your answer as a number accurate to 1 decimal place. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.

Find the derivative of the function. y = 5(2-x²)4 Step 1 Apply the general power rule which states that if y = [u(x)], where u is a differentiable function of x and n is a rational number, then dy/dx = n[u(x)]n-¹du/dx Let u = 2x² and substitute u for 2x² in the original equation. y = 5(2-x²)4 = 5 4(-2x) (2-x²) ³

For each expression, simplify if possible. If applicable, click on "Cannot be simplified". 4v + 3/3y + 4 v + 6/-v-6

a) Simplify (m8)4 and write your answer without using negative exponents. (b) Simplify (5y9)3 and write your answer without using negative exponents.

Which of the expressions is not equivalent with the rest? a) 79% more than x b) Cost of an item is x with 70% markup and 9% sales tax applied c) 1.79x d)x(1+7. 1/10 + 9. e) They are all equivalent expressions

A circle has a diameter with endpoints at A (-1, -9) and B (-11, 5). The point M (-6, -2) lies on the diameter. Prove or disprove that point M is the center of the circle by answering the following questions. Round answers to the nearest tenth (one decimal place). What is the distance from A to M? What is the distance from B to M? Is M the center of the circle? Yes or no?

Describe how to transform the graph of y = (3)" on to the graph y = 4(3) +2. The graph has a vertical shift down 2 units, a reflection over the y axis and a vertical shrink by a factor of 1/4. The graph has a vertical shift up 2 units, a reflection over the y axis and a vertical stretch by a factor of 4. The graph has a vertical shift up 4 units, a reflection over the x axis and a vertical stretch by a factor of 2. The graph has a vertical shift down 2 units, a reflection over the x axis and a vertical stretch by a factor of 4.

Nadia notices that sales have gradually decreased over the past two years. The sales team has not changed, nor have the products. What should Nadia do next? Read the following possible courses of action and decide which is the BEST way to handle the situation and which is the WORST way to handle the situation. 1. Discontinue all products and offer new products to meet the changing marketplace. 2. Meet with the sales team and brainstorm reasons for declining sales. 3. Ask the sales team to research, evaluate, and test new sales strategies. 4. Conduct a customer survey to find out what customers are saying. Which is the BEST way to handle the situation? Option 1 Option 2 Option 3 Option 4 Which is the WORST way to handle the situation? Option 1 Option 2 Option 3 Option 4

A triangle drawn on a map has sides that measure 15 cm, 8 cm, and 10 cm. The shortest of the real-life distances is 127 km. Find the longest of the real-life distances. corresponding A. 207.7 km B. 217.7 km C. 282.1 km D. 238.1 km

1/2x + 1/3y = 0 1/4x - 1/2y = 8 What is the solution of the system shown? (8,-12) (8,12) (-8, 12)

Solve for x. 8(x - 1) = 4x + 136 A. x=181/12 B. x=36 C. x=11 D. x=12

In the expression below, the x is the 3x + 2 A. Coefficient B. Constant C. Operator D. Variable

It is often necessary to do calculations using scientific notation when working chemistry problems. For practice, perform each of the following calculations. (4.47×10%)(1.00×10)= 1.52x10/3.90×10 (4.47×10 (5.19×10)/(1.00×101.52×10)

Ravi rented a truck for one day. There was a base fee of $18.95, and there was an additional charge of 86 cents for each mile driven. Ravi had to pay $189.23 when he returned the truck. For how many miles did he drive the truck?

For f(x) =x/x+1 and g(x)=2/x find a. (fog)(x); b. the domain of f o g a. (fog)(x) = (Simplify your answer.) b. What is the domain of f o g?

Suppose that the property tax is figured by multiplying the cost of your acreage by 0.293. Change 0.293 to a percent. Write your answer in percent form.

A mineral sample is found to have a density of 3.0 grams per cubic centimeter. It is then broken into two pieces, with one piece twice as large as the other. The smaller of the two pieces will have a density of: A) 6.0 g/cm3 B) 3.0 g/cm3 C) 1.5 g/cm3 D) 1.0 g/cm3

The words below have a similar denotation. Which word has the most. positive connotation as used in this sentence? He was _________ student. A. a good B. an admirable C. an excellent

Simplify by factoring: 16x - 24y 16 (x -8y) 24 (2x - y) Prime 8 (2x - 3y)

Mark is investing his money. He thinks that he should make $10 for every $100 he invests. How much does he expect to make on an investment of $800?

The city councilman asks the ice hockey team if they would prefer a new skate park or a new ice rink to be built as the new building to be funded by the city. Is the sample Biased or Unbiased? Unbiased Biased

A rocket is launched at the top of a building. The height of the rocket (in meters) written in terms of time (seconds) can be modeled by h (t) = -4.91² + 19.61 + 102.9. At what time does the rocket reach the maximum height? 3 seconds 7 seconds 5.5 seconds 2 seconds

Hattie had $5500 to invest and wants to earn $600 in interest this year. She will put some of the money into an account that earns 9% per year and the rest into an account that pays 12% per year. How much money should she put into each account? Amount in 9% account: $ help (numbers) Amount in 12% account: $ help (numbers)

A builder of tract homes reduced the price of a model by 20%. If the new price is $400,000, what was its original price? How much can be saved by purchasing the model? The original price of the model was $ can be saved by purchasing the model.

he area of a triangular flag is 56 square centimeters. Its altitude is 2 centimeters longer than twice its base. Find the lengths of the altitude and the base. he length of the base is cm.

The Perot Museum of Nature and Science in Dallas, Texas, offers a number of different membership levels for visitors. The Premium Membership is the most popular and costs $25 for each member for 1 month. Last month, 100 people purchased the Premium Membership. This month, 40 new people bought a membership and 15 people canceled. How much money will the Perot Museum earn this month from Premium Memberships?

Three coins are tossed. What is the probability that all three will land tails up? Enter the number that belongs in the green box.

Solve the equation for exact solutions in the interval [0°,360°). Use an algebraic method. 6 sec ²θ tan θ = 8 tan θ Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The solution set is (Simplify your answer. Type an integer or a fraction. Use a comma to separate answers as needed. Do not include the degree symbol in your answer.) OB. The solution is the empty set.

Captain Argos is impressed by his flying speed over the ocean. In miles per hour, he's calculated his speed to be the same as T. Is this speed a rational or irrational number? Explain.

Use mathematical induction to prove the statement for all positive integers n. 2+14+26+...+(12n-10) = n(6n-4) What is the first step in a mathematical induction proof? A. Show that S₁ is true. B. Show that So is true. C. Show that Sk is true. D. Show that Sk + 1 is true. Show that 2+14+26++ (12n-10) = n(6n-4) for n = 1. Write the statement S₁. 2= (Do not simplify.) Simplify S₁ on the right. 2= Is S₁ a true statement?

A building casts a shadow 25 m long. At the same time, the shadow cast by a 44-cm tall pole is 59 cm long. Find the height of the building. A. 17.1 m B. 33.5 m C. 18.6 m D. 32.0 m

Determine the symmetries (if any) of the graph of the given relation. 4y³ = 6x³ +3 Choose the correct symmetry of the graph. A. It is symmetric with respect to the x-axis. B. It is symmetric with respect to the y-axis. C. It is symmetric with respect to the origin. D. It is not symmetric with respect to the x-axis, y-axis, or origin.