Find the perimeter of the following figure.
a. 32 ft
b. 40 ft
c. 48 ft
d. 52 ft

Simplify (4x^2 - 8xy + 2y^2) - (9x^2 - 4xy - 7y^2) a. -5x^2 + 4xy + 9y^2 b. -5x^2 - 4xy + 9y^2 c. -5x^2 + 12xy + 4y^2 d. -5x^2 - 4xy - 5y^2

An archaeologist in turkey discovers a spear head that contains 53% of its original amount of c-14. find the age of the spear head to the nearest year. (5250 isn’t right)

Apet store donated 50 pounds of food for adult dogs, puppies and cats to an animal shelter. 19 3/4 pounds was adult dog food and 18 7/8 pounds was puppy food. how many pounds of cat food did the pet store donate?