Find the period of the function.

y = 5 cos 1/2 x

The perimeter of a square is 40 cm what is its length

Levi's car used 8 gallons of gas to drive 280 miles. At what rate does his car use gas in gallons per mile? Express your answer in simplest form.

Alvin has a prism-like water tank whose base area is 0.9 square meters and height is 0.6 meters. He wants to buy guppy fish, and the pet store owner tells him to make sure their density in the tank isn't more than 5 fish per cubic meter.

Solve - x^2 (x-2) (x-5) ^3

Emily had some candy to give her five children. She first took two pieces for her self and then evenly divided the rest among her children. Each child received five pieces did she start?

Marlon and Brent are each measuring one of their shoes their shoes measure 11 inches in all. Marlon shoes is 1 inch longer than Brents shoe how long is Brents shoe?

It takes 20 minutes for 5 people to paint 5 walls. How many minutes does it take 9 people to paint 9 walls?

Any large random sample from a group of people will be representative of the entire group. True False

What is the simplified form of the following expression? Assume y not-equals 0. RootIndex 3 StartRoot StartFraction 12 x squared Over 16 y EndFraction EndRoot StartFraction 2 (RootIndex 3 StartRoot 6 x squared y squared EndRoot) Over y EndFraction

Which is an exponential decay function? f (x) = 0.2 x f (x) = - 3.1x f (x) = 10x f (x) = - 2 (0.7) x