Question

Constructing Functions Express the gross salary G of a person who earns $14 per hour as a function of the number x of hours worked. Find the domain. - Population as a Function of Age The function P(a) = 0.027a2 6.530a + 363.804 represents the population P (in millions) of Americans that are a years of age or older in 2015. (a) Identify the dependent and independent variables. (b) Evaluate P(20). Provide a verbal explanation of the meaning of P(20). (c) Evaluate P(0). Provide a verbal explanation of the meaning of P(0).

Answer 1

(a) The independent variable is age (a) and the dependent variable is population (P).

(b) P(20) = 6.38 million. This means that 6.38 million Americans were 20 years or older in 2015.

(c) P(0) = 363.804 million. This means that 363.804 million Americans were 0 years or older in 2015.