What I'd the square root of 81

What is the contrapositive of if a, then b? A.) if b, then a B.) if a, then not b C.) if not b, then not a D.) if not a, then not b

At the beginning of the summer, Paul has $76. During the summer, he earns money by mowing lawns. The table shows the total amount of money Paul has after mowing the given number of lawns.

A sugar cookie recipe calls for 5 cups of flour for every 1 cups of sugar. If y y is the number of cups of flour and x x is the number of cups of sugar, write a formula to determine the number of cups of flour needed for any number of cups of sugar.

Solve the following equation. x 6 = x x

The set of whole numbers includes all positive integers

An Investor invested a total of $2,600 in two mutual funds. One fund earned 7% profit while the other earned 3% profit. If the investor's total profit was $150, how much was invested in each mutual fund?

Physics students drop a ball from the top of a 100 foot high building and model its height as a function time with the equation h (t) = 100 - 16t^2. The height, h, is measured in feet and time, t, is measured is seconds. Find the value of h (0).

If 1 adult female is randomly selected, find the probability that her pulse rate is less than 76 beats per minute.

What is 12:478 12:336 33:2242 82:5514 61:5320 28:776 and 23:1624

To win the jackpot, 4 different numbers are randomly selected from 1 to 46 and one number from 1 to 22. The order of the first 4 numbers does not matter. What is the probability of winning the jackpot on one try?