Question

convert -1.4°f to degrees celsius. round your answer to the correct number of significant figures.

Explanation:

Step1: Recall the conversion formula

The formula to convert Fahrenheit ($F$) to Celsius ($C$) is $C=\frac{5}{9}(F - 32)$.

Step2: Substitute the given value

Substitute $F=- 1.4$ into the formula: $C=\frac{5}{9}(-1.4 - 32)$.
First, calculate the value inside the parentheses: $-1.4-32=-33.4$.
Then, $C=\frac{5}{9}\times(-33.4)$.
$C=\frac{-167}{9}\approx - 18.56$.

Step3: Round to significant - figures

The input value $-1.4$ has two significant figures. Rounding $-18.56$ to two significant figures gives $-19$.

Answer:

$-19$