Answer:
$55.43
Step-by-step explanation:
The maximum amount she can spend on craft supplies before taxes is such that when the tax rate is applied on (or multiplied with) the amount, the result is $60. As such, if the amount is x then x is such that
x + 8.25% * x = 60
x + 0,0825x = 60
1.0825x = 60
x = 55.427
This is the maximum amount that may be spent on craft supplies to ensure that the budget is not exceeded.
(7.488 x 10^-8) ÷ (3.12 x 10^2) = (7.488/3.12) x 10^(-8 - 2) = 2.4 x 10^-10
divide cost by quantity. The lowest rate is the best buy:
26/8 = 3.25 each
30/5 = 6.00 each
15/4 = 3.75 each
39/12 = 3.25 each
45/10 = 4.50 each
The 8 for 26 and the 12 for 39 are both the same price each and are the better buys.
The answer is 13.83 if you use a calculator