Answer:
Step-by-step explanation:
Total Cost = 150 + 69.50*12
Total Cost = 150 + 834
Total Cost = 984
Hidden in that is a 6% sales tax
Cost before sales tax = 1.06 * x = 984. This is the key step. The 6% sales tax is hidden in the 1.06. So you call the original price = x.
1.06 * x = 984 Divide by 1.06
x = 928.3 without the sales tax
The question seems to be answered by 984. The sales tax is in that cost.
The increase of 45 to 75 is a positive increase. The decrease from 75 to 45 is a negitive
Answer:

Step-by-step explanation:
We have to simplify the given exponential expressions
Exponential properties:

Simplification takes place in the following manner:
1)

2)

3)

4)
