From 1960 to 1970, the consumer price index (cpi) increased from 29.6 to 38.8. if a dozen tangerines cost $0.31 in 1960 and the price of tangerines increased at the same rate as the cpi from 1960 to 1970, approximately how much did a dozen tangerines cost in 1970?

The percent increase in the price index from 1960 to 1970 is:

% increase in price index = (38.8 – 29.6) * 100% / 29.6

% increase in price index = 31.08%

Therefore the price of a dozen tangerines in 1970 (X) is:

31.08 = (X - $0.31) * 100 / $0.31

X = $0.41

1.45

Step-by-step explanation:

29.6=42.898

Divide 42.898 by 29.6 and that will round up to be 1.45 which is correct on apec

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180