Answer
(a.) The scientific notation is $ \$ 1.0813 \times 10^4 $.
Decimal notation rounded to the nearest dollar is $ \$ 10,813 $.
(b.) The average monthly per person benefit is $ = \$ 901 $.
Work Step by Step
(a.)
In the graph consider third and fourth column.
The third column.
The federal cost (billions of dollars) for social security is $ 519 $.
In scientific notation $ 5.19 \times 10^{11} $.
The fourth column.
and The enrollment (millions of people) for social security is $ 48 $.
In scientific notation $ 4.8 \times 10^{7} $.
Average per person benefit $ = \frac{federal \; cost}{enrollment} $.
$ = \frac{5.19 \times 10^{11}}{4.8 \times 10^{7}} $
$ = \frac{5.19 \times 10^{11}}{4.8 \times 10^{7}} $
$ =10812.5 $.
Rounded to the nearest dollar is $ =\$ 10,813 $.
The scientific notation is $ =\$ 1.0813 \times 10^4 $.
(b.)
The average yearly per person benefit for social security is $ =10812.5 $.
For monthly divide the yearly average by $ 12 $.
$ = \frac{10812.5}{12} $
$ = 901.0417 $.
Rounded to the nearest dollar.
$ = \$ 901 $.
