How to calculate surface area of a donut shape, that is 1 inch wide, has a outer radius of 2.5 and a inner radius of 1.5

1. Astronomers measure large distances in light-years. One light year is the distance that light can travel in one year, or approximately 5.88 x 10^12 miles. Suppose a star is 9.8 x 10^1 light years from Earth.

Unit rate for 45.5 meters in 13 seconds

In a survey of college students, 824 said they have cheated on an exam and 1727 said that they have not. If one college student is selected at random, find the probability that the student has cheated on an exam.

What is 4.21 rounded to the nearest whole number?

Find the sum of the geometric sequence 3, 15, 75, 375, ... when there are 9 terms and select the correct answer below. a. - 976,563 b. 976,563 c. 1,464,843 d. 976,562

Destiny needs a new coat for the winter and she found one at old navy for $48.88. The sales tax is 8%. How much will she pay for the sales tax?

Jessie sorted the coins in her bank she made 7 stacks of 6 dimes and 8 stacks of 5 nickels she then found 1 dime and 1 nickel how many dimes and nickels does Jessie have in all

If Tina talks fewer than 100 minutes a month, she does not have to pay anything. True / False Evidence:

Five sixths of the 300 triathletes completed the course

Length of a rectangular prism is increased by factor of 1.5. The width is doubled and height is tripled.