PLEASE HELP I WILL GIVE 50 POINTS The function, f, gives the number of copies a book has sold w weeks after it was published. The equation

f(w) = 500 • 22 defines this function. Select all domains for which the average rate of change could be a

good measure for the number of books sold.

a. 0 ≤ w ≤ 2

b. 0 ≤ w ≤ 7

c. 5 ≤ w ≤ 7

d. 5 ≤ w ≤ 10

e. 0 ≤ w ≤ 10

your answer would be b

step-by-step explanation:

your answer is the frist one

hop i

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5