Ineed bad this is so hard i don't know what to do

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

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

The square root of 9x plus 7 plus the square rot of 2x equall to 7