Solve the problem.
-Your company uses the quadratic model $y = - 4.5 x ^ { 2 } + 150 x$ to represent the average number of new customers who will be signed on (x) weeks after the release of your new service. How many new customers can you expect to gain in week 22?
A) 1122 customers
B) 561 customers
C) $- 528$ customers
D) 3201 customers

Question

Quizplus · Accepted Answer

To find the number of new customers in week 22, substitute $x = 22$ into the quadratic model $y = - 4.5 x ^ { 2 } + 150 x$. This gives $y = - 4.5(22)^2 + 150(22) = - 4.5(484) + 3300 = - 2178 + 3300 = 1122$ customers.

Solve the Problem y=−4.5x2+150xy = - 4.5 x ^ { 2 } + 150 xy=−4.5x2+150x

Solve the Problem $y = - 4.5 x ^ { 2 } + 150 x$