Question

In the formula V=45(2)^(-0.9t), what is the value of the textbook when it is new?

a) $45
b) $22.5
c) $67.5
d) $90

Answer 1

The value of the textbook, when it is new, is determined by evaluating the formula V=45(2)^(-0.9t) at t=0. The value is $45, which is option (a).

Step-by-step explanation:

To determine the value of the textbook when it is new, we need to evaluate the given formula V=45(2)^(-0.9t) at the time t = 0, since this represents the time when the textbook is brand new. Setting t to 0 yields:

V = 45(2)^(-0.9×0)

V = 45(1)

V = $45

Therefore, the value of the textbook when it is new is $45, which corresponds to option (a).