In 1962, the average cost of 1 gallon of gasoline in the United States was $0.31. The cost of gasoline increased by an average of 3% per year. What was the average cost of 1 gallon of gasoline in 1972?

A.
$0.32

B.
$0.40

C.
$0.42

D.
$0.93

$0.42

Step-by-step explanation:

The rate at which the average cost of 1 gallon of gasoline is increasing is exponential. We would apply the formula for exponential growth which is expressed as

y = b(1 + r)^ t

Where

y represents the cost after t years.

t represents the number of years.

b represents the initial cost.

r represents rate of growth.

From the information given,

b = $0.31

r = 3% = 3/100 = 0.03

t = 1972 - 1962 = 10 years

Therefore,

y = 0.31(1 + 0.03)^10

y = 0.31(1.03)^10

y = $0.42

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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pls mark as brainliest

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i