Help please
Simplify the expression: (a^5)^3 *
A. a^8
B. a^2
C. a^15
D. a^(-2)

How to do this , and can some one explain

Astocks price gained 3% in april and 5% in may and then lost 4% in june and 1% in july during which month did the stocks price change the most

Shown here are the three essential steps in a proof of the pythagorean theorem. comparing the 1st and 3rd steps how are the colored regions related as to the areas? a. yellow+blue=orange b. orange=yellow=green c.yellow+blue=green=orange d.yellow+green=orange+blue