Question

I NEED HELP! The temperature falls from 0 degrees to Negative 12 and one-fourth degrees in 3 and one-half hours. Which expression finds the change in temperature per hour?

Negative StartFraction 7 over 2 EndFraction divided by StartFraction 49 over 4 EndFraction
Negative StartFraction 7 over 2 EndFraction times StartFraction 49 over 4 EndFraction
Negative StartFraction 49 over 4 EndFraction times StartFraction 7 over 2 EndFraction
Negative StartFraction 49 over 4 EndFraction divided by StartFraction 7 over 2 EndFraction

Answer 1

the last option is correct

Explanation:

Answer 2

Last option is the correct choice.

Explanation:

Convert the mixed numbers into fraction and apply the rate formula.

Rate = Change / Unit Time

= 12 1/4 ÷ 3 1/2

= 49/4 ÷ 7/2 (Answer matching with the last option)

= 49/4 x 2/7 (Inverting the second fraction)

= 7/2

= 3 1/2

The rate of change per hour is 3 and a half degrees in temperature.

Best Regards!