7. Alice wants to calculate the total cost for a dress. The dress costs $53.99
and sales tax is 7%. Which expression represents how she could
calculate the total cost?
A 53.99(0.07)
B. 53.99(0.7)
c. 53.99(1.07)
D. 53.99(1.7)

C

First concert the percent into a fraction
7% becomes 0.07
70% would become 0.7

Then if you want the total cost you have to multiply the original cost by itself as well by adding 1.00 to the decimal
Otherwise just use the percent

0.07 + 1.00 = 1.07
53.99 * 1.07 = 57.77

The answer is b.a, c, and d are not correct