Determine which of the following equations model exponential decay
a ) k(x) = 85(2x)^48
b ) f(x) = .0382(4)^x
c ) g(x) = (.825)^8x -11
d ) h (x) = 985 (1) ^x

What is sin 7x/4 ? i need on this urgent trig

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Alocal hamburger shop sold a combined total of 601 hamburgers and cheeseburgers on friday. there were 51 more cheeseburgers sold than hamburgers. how many hamburgers were sold on friday? a local hamburger shop sold a combined total of hamburgers and cheeseburgers on friday. there were more cheeseburgers sold than hamburgers. how many hamburgers were sold on friday?