I guess it is none, because if you multiply all these options by 7.5, you will not get 32. However, option C multiplied with 7.5 does get you 32.4, which rounds to 32, so my advice to be to answer with C. $4.32
1/3 x 1/9
Change the denominator(bottom half) so that they have the same factors, but when doing this you have to change the top too. 3 x 3 is 9 so the denominator will be 9 for both fractions, then 1 x 3 is 3 so the equation will look like this:
3/9 x 1/9
Then you can multiply
3/9 x 1/9 = 3/9 which can reduce to 1/3
Hope this helps, it's harder to explain math virtually.
The cube root values and a graph of them are shown in the attachment.
_____
The cube root of a negative number is negative. These all have exact (rational) cube roots.
Answer:
$528
Step-by-step explanation:
If cost is proportional to order quantity, the cost for 17+5 = 22 cases of cups will be 22/17 times the cost for 17 cases:
(22/17)($408) = $528