Leiff goes online to buy a new video game. he finds a site that currently has a promotion of 15% off on all orders over $50. leiff decides to buy his video game, with a price tag of $128, at this site because he knows that he will get the 15% discount when he checks out. leiff pays a 5.3% sales tax on the discounted price and pays a shipping fee of $4.75.
what is the total of leiff’s online purchase?

a. $112.84
b. $114.57
c. $118.82
d. $119.32

Option d is the correct answer

Step-by-step explanation:

The price tag on the video game was $128. The site currently has a promotion of 15% off on all orders over $50. This means that the video game qualifies for the promotion. The cost of the video game would be

128 - (15/100 × 128) = 128 - 19.2 = $108.8

Leiff pays a 5.3% sales tax on the discounted price. This means that he paid 5.3% sales tax on 108.8. The amount with the sales tax becomes

108.8 + (5.3/100 × 108.8)

108.8 + 5.7664 = 114.5664

He pays a shipping fee of $4.75. It means that the total of Leiff’s online purchase is 114.5664 + 4.75 = 119.3164

Approximately 119.3

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

nswer: a   y-axis

step-by-step explanation: