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

Answer:

The correct option is C.

Step-by-step 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

$\frac{29.6}{38.8}=\frac{0.37}{x}$

$29.6x=0.37\times 38.8$

$x=\frac{0.37\times 38.8}{29.6}$

$x=0.485$

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.

Answer 2

im pretty sure its C $0.12


best of luck hope i helped :)