GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
The revenue, R, that a company earns from offering x promoti
[#permalink]
07 Oct 2020, 13:14
07 Oct 2020, 13:14
1
Expert Reply
00:00
Question Stats:
55% (01:25) correct
44% (01:14) wrong based on 104 sessions
Hide Show timer Statistics
The revenue, R, that a company earns from offering x promotional discounts is given by the function \(R(x) = −2x^2 + 32x +160\).
A. Quantity A is greater.
B. Quantity B is greater.
C. The two quantities are equal.
D. The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
The revenue earned from offering five discounts |
The revenue earned from offering 11 discounts |
A. Quantity A is greater.
B. Quantity B is greater.
C. The two quantities are equal.
D. The relationship cannot be determined from the information given.
Re: The revenue, R, that a company earns from offering x promoti
[#permalink]
07 Oct 2020, 20:00
07 Oct 2020, 20:00
quant A: R(5)=270
quant B: R(11)=270
quant A=quant B
option C is correct
quant B: R(11)=270
quant A=quant B
option C is correct
Re: The revenue, R, that a company earns from offering x promoti
[#permalink]
09 Oct 2020, 03:45
09 Oct 2020, 03:45
Expert Reply
Another approach is the equation above is a parabola which symmetry is
\(x=-\frac{b}{2a}\)
\(x=-\frac{32}{2(-2)}=8\)
8 is equidistant from 5 and 11 so the answer must be C
\(x=-\frac{b}{2a}\)
\(x=-\frac{32}{2(-2)}=8\)
8 is equidistant from 5 and 11 so the answer must be C
