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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:
56% (01:25) correct
43% (01:14) wrong based on 105 sessions
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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
