140 is 80% of what number

A company is testing a product which is intended to make hair grow faster. One of the test subjects started with a hair length of 8.2 inches. After a year of using the product, the test subject's hair measured 18.4 inches.

Which graph represents the function f (x) = 5-5x^2/x^2

Four years ago, Elliott was half as old as George. Two years from now, Elliott will be four-fifths as old as george. How old are Elliot and George?

A colony of 50 bacteria doubles in size every 170 minutes. What will the population be 680 minutes from now? (not multiple choice)

Describe a real-world situation in which you would want to find the surface area of a prism.

How many comparisons are needed for a binary search in a set of 64 elements?

8x-9y=1 (3,-4) Slope intercept form

Which of the following correctly describes a concave polygon? A. In a concave polygon, each interior angle is less than 180°. B. In a concave polygon, at least one interior angle is greater than 90°. C.

Find the mode of the following distribution X 35 38 40 f 15 9 9 10 10

Suppose Ravi places $8500 in an account that pays 2% interest compounded each year. Assume that no withdrawals are made from the account. How much does he make after 1 year How much after 2