Which expression is equivalent to (1/2(cos(pi/5)+ I sin(pi/5)))^5?

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Ten members of balin's soccer team ran warm ups for practice. each member ran the same distance. their combined distance was 5/6 of a mile. to find the distance that each member ran, balin wrote the expression below.