9. The perimeter of a church window is 80 inches. If the window is in the shape of a square, what is the length of ea A. 15 inches
B. 60 inches
C. 20 inches
D. 40 inches

20 inches

Step-by-step explanation:

Side = perimeter / 4

= 80 / 4 = 20 inches

54

step-by-step explanation:

6x9

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation: