Math Questions

Harold can make 9 pizzas in an hour. Write an equation that shows the relationship between hours (h) and pizzas (p). A. h+9=p B. 9p = h C. 9h=p D. hp = 9

A petri dish of bacteria grow continuously at a rate of 200% each day. If the petri dish began with 10 bacteria, how many bacteria are there after 5 days? Use the exponential growth function f(t)= ae^rt, and give your answer to the nearest whole number. You may use the Desmos scientific calculator: https://www.desmos.com/scientific.

A professor must randomly select 4 students to participate in a mock debate. There are 20 students in his class. In how many different ways can these students be selected, if the order of selection does not matter?

A blueprint shows an apartment with an area of 15 square inches. If the blueprint's scale is 1 inch : 8 feet, what will the actual square footage of the apartment be?

John runs 3 miles in 1/2 of an hour. At the same pace, how many miles will he run in 1 hour? 6 1/4 miles 6 miles 3 3/4 miles

There is a direct path from Gayle's house to the store. Due to construction, the direct route is closed and Gayle must travel 6 miles east and then 8 miles north in order to get to the store. How long is the direct path from Gayle's house to the store? 10 miles 12 miles 14 miles

A car travels 67 miles per hour. Write an equation that shows the relationship between hours (h) and miles (m). A. 67h=m B. 67 = hm C. h+67=m D. none of the above

Brian made a rectangular prism with a length of 6 in., a width of 4 in., and a height of 8 in. If he doubled the height and width, what will be the volume of the new rectangular prism? The volume of the new rectangular prism is 68 times the original volume. The volume of the new rectangular prism is 6 times the original volume. The volume of the new rectangular prism is 4 times the original volume. The volume of the new rectangular prism is 2 times the original volume.

On a map, the scale shown is 1 inch 3 miles. If an island is 0.5 square inches on the map, what is the actual area of the island?

Sets C and D are subsets of the universal set U. These sets are defined as follows. U = {q, r, x, y, z} C = {x, z} D={q, y, z} Find the following sets. Write your answer in roster form or as Ø. (a) CUD' = (b) C'nd' =

Select the correct answer. The length, that a spring is stretched varies directly as the amount of force, F. applied to the end of the spring. When a force of 10 pounds is applied to a spring, it stretches 3 inches. How much will the same spring stretch if the force is increased to 15 pounds? A. 8 inches B. 7.5 inches C. 4.5 inches D. 2 inches

Find f'(x) and simplify. f(x)= x/x+2 Which of the following shows the correct application of the quotient rule? A. (x+2)(1)-(x)(1)/ [x+2]² B. (x)(1)-(x+2)(1)/[x+2]² C. (x)(1)-(x+2)(1)/[x]² D. (x+2)(1)-(x)(1)/[x]²

When the volume of a gas is changed from 3.6 L to 15.5 L, the temperature will change from °C to 87°C.

A model of a car is built with a scale of. 1 inch 4 feet. If the length of the model car is 2.7 inches, then the length of the actual car is ft.

Type the correct answer in the box. The measure of angle θ is 5π/6. The equivalent measurement in degrees is

Blue River is 212 miles long. What is the length of the river on a map, if the scale is 1 inch : 50 miles?

A package of twelve eggs costs $5. At this price, how much does each individual egg cost? (Round to the nearest cent.) A. $0.42 B. $1.24 C. $2.40 D. none of the above

The vertices of a rectangle are R(-5, -5), S(-1,-5), T(-1, 1) and U(-5, 1). After R' is the point (3, 0). Find the translation and coordinates of U'. translation, [A] (8,-5); (3,-4) [B] (5,-8); (0,-7) [C] (-5, 8); (-10, 9) [D] (8,5); (3, 6)

Sally lives in City A and works for the department of transportation. She needs to inspect the weigh stations in each of three cities other than City A. In how many ways can she reach each of these cities and return to her home in City A?

Which of the following sets could be the sides of a right triangle? (2,3,√13) (2, 2, 4) (1, 3, √3)

Find the exact value of cos^-1(cos(-2π/5)). Write your answer in radians in terms of π. If necessary, click on "Undefined."

Question 5 of 25 Solve 4(x-7)+ 10 = -10. A. x = 3 B. x = 2 C. x = 4 D. x = 1

Tyler drew a figure that has two pairs of equal sides, four angles formed by perpendicular lines, and two pairs of parallel sides. What geometric term best describes the figure Tyler drew? A. Parallelogram B. Rhombus C. Rectangle D. Trapezoid

Which statement about k(x) = -x² - 2x + 15 is true? F The zeros are -3 and 5, because k(x) = -(x+3)(x - 5). G The zeros are -5 and 3, because k(x) = -(x + 5)(x-3). H The zeros are -5 and -3, because k(x) = -(x + 5)(x+3) J The zeros are 3 and 5, because k(x) = -(x-3)(x - 5).

Solve 3x + 4(x + 6) = 45. A. x = 7 B. x = 6 C. x = 5 D. x = 3

A study concludes that 15 percent of all college students attend a gym class. Which of the following statements is true? 15 percent is a parameter. 15 percent is an ordinal measurement. 15 percent is categorical data. 15 percent is a statistic.

Alfredo bought a fishing pole for 60% off its original price of $97. If the tax was 4% (of the sale price), how much did Alfredo pay for the fishing pole?

(11.2) Determine if each of the following is a parameter or a statistic. a) A survey of all employees at a company found that the mean one-way daily commute to work of the employees is 25.5 minutes. b) A car dealer has 1,600 cars on its lot and a sample of 25 cars is chosen. The dealer calculates the mean weight of those 25 cars. What does the mean represent?

Use the Change of Base Formula to evaluate log4 27. Then convert log4 27 to a logarithm in base 2. Round to the nearest thousandth. 3.296; log₂ 5.196 2.377; log₂ 13.5 2.377; log₂ 5.196 1.431; log₂ 13.5

A map's scale is 1 inch : 2.4 miles. The map shows an airport that is 5 inches away from a city. How far away is the airport actually from the city?

A space shuttle is made using a scale of 1 inch : 12 feet. If the actual space shuttle has a height of 84 feet, then the model is inches tall.

(11.5) In a survey of 42 U.S. children, 72% said they plan to complete a summer reading list this year. Give an interval that is likely to contain the exact percent of all U.S. children who plan to complete a summer reading list this year. Round to the nearest tenth of a percent. It is likely that the exact percent is between % and %.

A blueprint of a house shows a bedroom with an area of 12 square inches. If the blueprint's scale is 1 inch : 3 feet, what would be the actual square footage of the bedroom? square feet

A map's scale is 1 inch : 3.5 miles. If the actual distance between two places is 77 miles, then they will be__________ inches away from each other on the map.

If you borrow $400 for 3 years at an annual interest rate of 4%, how much will you pay altogether?

At work, Chris used 117 inches of tape to seal 9 boxes for shipping. The equation x/15 = 117/9 can be used to determine how many inches of tape, x, it will take him to seal 15 boxes. How many inches of tape will Chris need to seal 15 boxes for shipping? A) 182 hours B) 195 inches C) 208 inches D) 225 inches

Which two consecutive whole numbers does √39 lie between? Why? 5 and 6 because 39 falls between 5² =25 and 6² = 36. 4 and 6 because 39 falls between 4² = 16 and 6² = 36. 6 and 7 because 39 falls between 6² = 36 and 7² = 49. 5 and 7 because 39 falls between 5² = 25 and 7² = 49.

A construction worker leans a ladder against a building. The ladder is 27 ft long and the distance between the base of the ladder and the bottom of the building is 9 ft. Find the angle formed between the ground and the base of the ladder.

On a map, the scale shown is 1 inch : 5 miles. If an island is 2.5 square inches on the map, what is the actual area of the island? The actual island's area is square miles.

ΔABC is located in Quadrant I. Point A is 5 units to the right of the line of reflection. If ΔA'B'C' is the image created by reflection, where is A' relative to the line of reflection? A. 0 units away, directly on the line of reflection B. 2.5 units to the left C. 5 units to the left D. 10 units to the right

Suppose a house that costs $270,000 appreciates by 5% each year. In about how many years will the house be worth $350,000? Use the equation 350 = (270)(1.05)* and round the value of x to the nearest year. 6 5 7 4

A carpenter is framing a wall that is 8 feet high and 15 feet long. If the carpenter wants to be sure that the sides of the wall meet at right angles, then what should the diagonal measurement of the wall be? 13 feet 19 feet 17 feet

Jan is looking at a map of Roaring River. The map was created using the scale 1 inch : 25 miles. If the river is 5.5 inches long on the map, then it is actually miles long.

Alexandra owns a small business selling bagels. She knows that in the last week 95 customers paid cash, 4 customers used a debit card, and 31 customers used a credit car. Based on these results, express the probability that the next customer will pay with something other than a credit card as a fraction in simplest form.

Members of a school sports team are raising money by selling custom water bottles at school activities. They plan to sell each bottle for $11. Each bottle costs them $4. They spend $40 for advertising. Use n to represent the number of bottles they sell. Multiply this by the money they make for each bottle, then subtract the advertising cost. Which expression represents the money that the group raises? A. (11-4)n - 40 B. 11n - 4 - 40 C. 40 - (11 - 4) n D. 11 - 4n - 40

What is the length of the hypotenuse of a right triangle whose legs have lengths of 5 and 12? 13 17 15

If cosθ = 0.711, find θ, writing your answer to the nearest degree.

A gas that exerts a pressure of 215 torr in a container with a volume of 51.0 mL will exert a pressure of torr when transferred to a container with a volume of 18.5 mL.

On a map, the scale shown is 1 inch: 20 miles. If a city is 900 square miles, what is the area of the city on the map? The city's area is square inches on the map. (Do NOT round your answer.)

Postcards cost $2.50 for six. What's the price for 1 postcard? A. $7.10 C. $0.42 B. $6.25 D. none of the above