PLZZ HELP HAVE NO TIM!!

In exponential growth functions, the base of the exponent must be greater than 1,how would the function change if the base of the exponent were 1? how would the fiction change if the base of the exponent were between 0and 1

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction