What questions please give me the questions and i might have an answer for you.
Answer:

Step-by-step explanation:
Be VERY careful. When it write out the equation that way, it will give the speculation of this:

Now, in this case, since you were extra explanatory about this [what is written in parentheses], two factors I know of that multiply to 15 are these:
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8 1/2 = 8.5
10 3/4 = 10.75
9 3/4 = 9.75
8.5 + 10.75 + 9.75 = 29 inches in total <==
If 7 minutes is $2.45, then 13 minutes is $4.55 cuz 1 minute is 0.35 cents