PLZ HELP ME FILE ATTACHED

The discount was approximately 48%.

Step-by-step explanation:

The general forumla to calculate percent change (increase or decrease) is:

x 100

In this case, the original price was $28.00, but the new price (after discount) was $14.60.  Putting these values into the formula:

x 100 = 48%.

52.14%

Step-by-step explanation:

14.60 / 28.00 = x% / 100%

Cross multiply

14.6 x 100 = 28x

14600 = 28x

Divide by 28

521.43 = x

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

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2