Question

The space suit an astronaut wears is called an Extravehicular Mobility Unit (EMU). The EMU contains two oxygen tanks that carry a total of 120 cubic feet of oxygen. If the astronaut uses oxygen at rate of 15 cubic feet per hour, which of the following functions best models the amount of oxygen left in the tank after t hours?Group of answer choicesV(t) = 120t - 15V(t) = 120 + 15tV(t) = 120 - 15tV(t) = 120t + 15

Answer 1

Step 1:

In this question, we are given the following:

The EMU contains two oxygen tanks that carry a total of 120 cubic feet of oxygen.

If the astronaut uses oxygen at the rate of 15 cubic feet per hour.

Which of the following functions best models the amount of oxygen left in the tank after t hours?

Step 2:

The best function that models the amount of oxygen left in the tank after t hours is:

`V(t)\text{ = 120 - 15t -- OPTION C}`