You are a school photographer taking individual and class pictures for 2 classes of 21 students each. on average, each individual picture takes 3 minutes and a class picture takes 10 minutes. about how long should it take you to get all of the pictures?

146 minutes

Step-by-step explanation:

2 class has 21 students each

2 class has students = 21+21=42

It takes time to click picture of 1 student = 3 minutes

It takes time to click picture of 42 student = minutes

                                                                      = minutes

It takes time to click picture of 1 class = 10 minutes

It takes time to click picture of 2 class = 20 minutes

So, total time = 126 minutes + 20 minutes = 146 minutes

Thus it will take 146 minutes to get all of the pictures

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:

the answer is  

a.

4,624π mm2

step-by-step explanation: