PLEASE HELP: Given the function g(x) = x^2 + 10x + 20, determine the average rate of
change of the function over the interval –9 < x < 0.

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!