Question

Andrea's sleeping bag is designed for camping in temperatures of -9°C or warmer. For what Fahrenheit temperatures is her sleeping bag designed? Round to the nearest tenth of a degree.

A. -22.8° F or warmer


B. 41.4° F or warmer


C. -37.0° F or warmer


D. 15.8° F or warmer

help needed plz I put c and it was worng. will give medals

Answer 1

formula for converting Celsius to Fahrenheit is : C x 9/5 + 32 = F
so we have C = -9
now we sub
-9 x 9/5 + 32 = F
-81/5 + 32 = F
-81/5 + 160/5 = F
79/5 = F
15.8 = F (answer is D)

Remember this :
C to F : multiply by 9, divide by 5, then add 32
F to C : deduct 32, multiply by 5, then divide by 9