1) carl and four others bought identical shirts. the cost for all five shirts was $115 plus 8%
sales tax. if each person contributed $23, would that be enough to cover the bill?

1.18 more is needed.

Step-by-step explanation:

Each person puts in 23 dollars

1 person = 23$

5 people = 23 * 5 = 115

That pays for the shirts, it does not pay for the sales tax. So the answer is no. How much more do they need to put in?

8% * 115 = 8/100  * 115 = 9.20 dollars

9.2 / 5 = 1.84

Each person has to put in 1.84 dollars more to meet the full amount of the bill.