If the cos 42° = one half, then the sin 48° =

two thirds, because the angles are complementary
2 over 1, because the angles are supplementary
one half, because the angles are complementary
1, because the angles are complementary

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

Explain how you can use the associative property to evaluate (7x50)x4.

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0