Question

question 2, 1.1.2
part 1 of 2
hw score: 5.88%, 1 of 17 points
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a) at a particular gas station, the cost of a gallon of gas, in dollars, is a function of its octane. explain the meaning of f(87).
b) when john is driving to school, the distance traveled, in miles, is a function of time, in minutes. explain the meaning of s(25).
a) choose the correct answer below
a. f(87) is f times the cost of a gallon of gas, in dollars.
b. f(87) is the cost, in dollars, of one gallon of 87 - octane gasoline.
c. 87 is the cost, in dollars, of one gallon of f(87)-octane gasoline.
d. f(87) is f times 87 - octane gasoline.

Explanation:

a) Since the cost of a gallon of gas (in dollars) is a function of its octane, f(x) represents the cost as a function of octane level x. When x = 87, f(87) is the cost of one - gallon of 87 - octane gasoline.
b) Since the distance traveled (in miles) is a function of time (in minutes), s(t) represents the distance as a function of time t. When t = 25, s(25) is the distance traveled in 25 minutes.

Answer:

a) B. f(87) is the cost, in dollars, of one gallon of 87 - octane gasoline.
b) s(25) is the distance traveled, in miles, in 25 minutes.