For a scientific experiment, a physicist must make sure that the temperature of a metal does not get colder than - 75°C or the metal will not be usable. The physicist changes the metal's temperature at a steady rate of - 5°C per hour.

Part 1 out of 3

Let t represent time in hours. Enter an inequality. Use the fact that the rate of change in temperature times the number of hours equals the final temperature.

The inequality is?

Question

Cynthia Hester

6 September, 17:54

+4

Answers (1)

Know the Answer?

Kira Romero · Answer 1

If t₀ is the initial temperature of the metal then after time t hours the temperature will be t₀-5t, which must not go below - 75℃.

So t₀-5t≥-75.