Answer these following
1. what is (-7)^5 in expanded form
2. solve 2s^3 - 4r^2 if r = 1 and s = 5 (explain all steps)
3. how would you convince a fellow student that the number 0.57 is a rational number?

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.