Can someone pls help

Describe how to determine the average rate of change between x = 4 and x = 6 for the function f(x) = 2x^3 + 4. include the average rate of change in your answer.

Function 2 f(x) = -x2 + 2x - 15 function _has the larger maximum. (put 1 or 2 in the blank space) numerical answers expected! answer for blank 1:

Brainliest sealy's parents gave her $70 to spend at the briarridge fair .she spent $10 on flowers.if each antique flower vase at the fair costs$3 each,solve the inequality 10+3a≤70 to determine how many antique flower vases can sealy buy?