Question

Question 4

2 pts
At noon, a barista notices that she has $30 in her tip jar. If she makes an average of $0.45
from each customer, how much will she have in her tip jar if she serves n customers during
her shift?
(equation)
How much will she make if she serves 134 customers?
How many customers did she serve by noon?

Answer 1

a
`A = 30 + 0.45 n`

b
`A = 90.3`

c 0 customers

Explanation:

Given

`Base\ Amount = 30`

`Rate = 0.45` per customer

Solving (a): Amount (A) on n customers

This is calculated as:

`A = Base\ Amount + Rate * n`

`A = 30 + 0.45 * n`

`A = 30 + 0.45 n`

Solving (b): Amount on 134 customers

In this case: n = 134

So:

`A = 30 + 0.45 * 134`

`A = 30 + 60.3`

`A = 90.3`

Solving (c): Customers at noon.

At noon, the amount is 30.

So:

`A = 30 + 0.45 n`

`30 = 30 + 0.45n`

Collect like terms

`0.45n = 30 - 30`

`0.45n =0`

`n = 0`