Solve the Problem $\frac { 9 } { 5 }$ And Add 32 to the Result

Multiple Choice

Solve the problem.
-To convert a Celsius temperature to a Fahrenheit temperature, we multiply the Celsius temperature by $\frac { 9 } { 5 }$ and add 32 to the result. When the temperature is $90 ^ { \circ } \mathrm { C }$ , what is the temperature in degrees Fahrenheit?

A) $194 ^ { \circ } \mathrm { F }$
B) $219.6 ^ { \circ } \mathrm { F }$
C) $168.4 ^ { \circ } \mathrm { F }$
D) $81.5 ^ { \circ } \mathrm { F }$