Tom buys a super sized set of crayons of 304 crayons for his sister. The original price of the set was 42.50. It was on sale for 35.70. What percent off was the sale price? A 84%
B 16%
C 119%
D 6.8%

try D if not try B

Step-by-step explanation:

the answer is 16%

Step-by-step explanation:

answer: idk

step-by-step explanation:

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