Question

From 1960 to 1970, the consumer price index (CPI) increased from 29.6 to 38.8. If a macaroni and cheese dinner cost $0.37 in 1960 and the price of macaroni and cheese increased at the same rate as the CPI from 1960 to 1970, by approximately how much did the price of a macaroni and cheese dinner increase from 1960 to 1970? A. $0.39 B. $0.30 C. $0.12 D. $0.49

Answer 1

im pretty sure its C $0.12


best of luck hope i helped :)

Answer 2

The correct option is C.

Explanation:

From 1960 to 1970, the consumer price index (CPI) increased from 29.6 to 38.8.

Let the macaroni and cheese dinner cost $x in 1960.

If a macaroni and cheese dinner cost $0.37 in 1960 and the price of macaroni and cheese increased at the same rate as the CPI from 1960 to 1970, then

`(29.6)/(38.8)=(0.37)/(x)`

`29.6x=0.37* 38.8`

`x=(0.37* 38.8)/(29.6)`

`x=0.485`

The macaroni and cheese dinner cost is $0.485 in 1970.

The price of a macaroni and cheese dinner increase from 1960 to 1970 by

`\$0.485-\$0.37=\$0.115\approx \$0.12`

The price of a macaroni and cheese dinner increased by $0.12 from 1960 to 1970.

Therefore the correct option is C.