Question

Plz help 52 points

For a scientific experiment, a physicist must make sure that the temperature of a metal does not get colder than −108°C or the metal will not be usable. The physicist changes the metal's temperature at a steady rate of −4°C per hour.

Answer 1

If the current temperature is 0 degrees C then:

27 hours

Explanation:

108 divided by 4=27 hours.

Answer 2

-3t < -78

÷-3 ÷-3

_________

t > 26

78÷26=3