A temperature measurement from the Earth's stratosphere is taken as -72 ${ } ^ { \circ } \mathrm { F }$ . The temperature on the Earth's surface below is found to be 39 ${ } ^ { \circ } \mathrm { F }$ . Find the difference between the surface temperature reading and the stratosphere temperature reading.
A) -34 ${ } ^ { \circ } \mathrm { F }$
B) -33 ${ } ^ { \circ } \mathrm { F }$
C) 34 ${ } ^ { \circ } \mathrm { F }$
D) 111 ${ } ^ { \circ } \mathrm { F }$
E) 33 ${ } ^ { \circ } \mathrm { F }$

Question

Quizplus · Accepted Answer

To find the difference, subtract the stratosphere temperature from the surface temperature: $39 \,^{\circ}\mathrm{F} - (-72 \,^{\circ}\mathrm{F}) = 39 \,^{\circ}\mathrm{F} + 72 \,^{\circ}\mathrm{F} = 111 \,^{\circ}\mathrm{F}$.

A Temperature Measurement from the Earth's Stratosphere Is Taken as -72