Which of these num. are prime:

1, 11, 21, 51?

The cooking club made some pies to sell at a basketball game to raise money for the new books. The cafeteria contributed four pies to the sale. Each pie was then cut into into five pieces and sold. There were a total of 60 pieces to sell.

Greatest common factor of 7x² and 21x

How do you make 21/100 to a decimal

Solve for s. 8 - 48 = 3 + 13

Here is the function for the number of zombies, N, after t years, with the negative exponent expressed using the fraction ½: N (t) = 300 • 0.5t/8 What is the half-life for the zombie population? Explain in terms of exponents.

Find the inverse of the function f (x) = 5/6x + 10

Darren decided to gift wrap his present. He knows that his gift is in the shape of a cube and that one side is 5 ½ inches. Darren has 150 square inches of paper. Is this enough to wrap the gift? Explain your answer.

The sum of two numbers is 90. their difference is 12. what are the numbers?

Stat crunch in a random sample of 200 adults, what is the probability that less than 33 % have no credit cards?

There are 2.54 centimeters in an inch. when using this conversion factor, how many significant figures are you limited to?