Juan bought 4.5 lbs of coffee for $7.98 per lb. Sales tax is 6%. What was the total amount Juan paid for the coffee?

the amount he paid is 36.06

Step-by-step explanation:

hope this helps

$33.7554

Step-by-step explanation:

4.5 x 7.98

35.91- the amount without the sales reduction

6% of 35.91

6/100 x 35.91

2.1546- the amount that was deducted

to find out how much he paid we will subtract the deducted amount from the original price which is

35.91-2.1546

$33.7554 is the amount he paid

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