Find the radius of the circle with an area of 153.9 in? use 3.14 for t.
a. 3.5 in.
b. 7 in.
d. 14 in.
c. 7.9 in.

B. 7 in.

Step-by-step explanation:

Area = A =pi r^2

r^2 = A / pi

r = √(A / 3.14)

= √(153.9 / 3.14)

= 7 in.

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: