Me ! will give brainliest to first correct ! picture below the graph of f(t) = 4 • 2t shows the value of a rare coin in year t. what is the meaning of the y-intercept? a. every year the coin is worth 4 more dollars. b. when it was purchased (year 0), the coin was worth $4. c. in year 1, the coin was worth $8. d. when it was purchased (year 0), the coin was worth $2.

4 units

Step-by-step explanation:

First of all, notice that the graph is NOT a straight line.  That means we should have written f(t) = 4*2^t instead of f(t) = 4*2t.

In words:  the value of this coin is 4 units at time t=0 and grows exponentially with time.  

This is an exponential function.  The y-intercept is obtained by letting t = 0 and evaluating f(0) = 4*2^0.  This is equal to 4*1, or just 4.  Once again, the y-intercept represents the initial value of the coin.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

answer: 3.26019516

step-by-step explanation: