The circle shown has center o and radius 4. what is the area of the shaded region?

The ratio of his savings: expenses = 7: 5

So, total of the ratio is = 7 +5 =12

His savings will be 7/12* allowance

His expenses will be 5/12 * allowance

We know that the allowance that he gets is $3

His savings = 7/12 * allowances  

His savings = 7/12 * 3

His savings = $7/4 or 1 ¾  

Now, we convert the 7/4 (or 1 ¾) into a decimal.  

1 ¾ when converted is decimal is 1.75

His Savings = $1.75