Question

on a flight home from a trip to argentina, the temperature outside the plane was - 40 °c. someone asked what that would be on the fahrenheit scale, and budd said \just multiply by 2 and add 30.\ a. what was the temperature in °f according to budds approximation? °f b. what is the actual temperature in °f? °f question help: video ebook

Explanation:

Step1: Calculate temperature using Budd's approximation

Multiply -40 by 2 and add 30.
$-40\times2 + 30$
$=-80 + 30$
$=-50$

Step2: Calculate actual temperature using conversion formula

The formula to convert Celsius to Fahrenheit is $F=\frac{9}{5}C + 32$. Substitute $C=-40$ into the formula.
$F=\frac{9}{5}\times(-40)+32$
$=9\times(-8)+32$
$=-72 + 32$
$=-40$

Answer:

a. -50°F
b. -40°F