Question

1. when maria went skiing at 8 am, the temperature was - 7°fahrenheit. five hours later when she went home, the temperature was 23°fahrenheit. which of the following represents the temperature change from the time maria first started skiing to when she went home? (+ represents an increase in temperature and - represents a decrease.)

a. - 30°f
b. - 16°f
c. + 16°f
d. + 30°f

Explanation:

Step1: Identify initial and final temperatures

Initial temperature $T_1=-7^{\circ}F$, final temperature $T_2 = 23^{\circ}F$.

Step2: Calculate temperature change

The formula for temperature change $\Delta T=T_2 - T_1$. Substitute the values: $\Delta T=23-(-7)$.
Since subtracting a negative is the same as adding a positive, $\Delta T = 23 + 7=30^{\circ}F$. The temperature increased, so it is $+ 30^{\circ}F$.

Answer:

D. $+30^{\circ}F$