Answer:
1664 Hope this is right
Explanation:
You first need to find how many weeks is in a year.
Then multiply how many weeks that are in a year 52 by amount of money per week 4.
You get 208
Before the last step you need to subtract 15-7=8
Multiply 208 times 8 and that's your answer
He will have $1,664 on his 15th birthday.
If he is saving $4 per week for 8 years(15-7=8), and there are 52 weeks in a year, then 8x52=416 weeks. Then 416x4=1,664. Therefore, he will have $1248 dollars by his 15th birthday.
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