Question

laura checked her outdoor thermometer and noticed that the temperature rose from 31 degrees in the morning to 45 degrees in the afternoon. what is the approximate percent increase for the day so far? the percent increase is approximately 31%. the percent increase is approximately 45%. the percent increase is approximately 68%. the percent increase is approximately 82%.

Explanation:

Step1: Identify the formula for percent increase

The formula for percent increase is $\text{Percent Increase} = \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \times 100\%$.

Step2: Determine the old and new values

The old value (morning temperature) is 31 degrees, and the new value (afternoon temperature) is 45 degrees.

Step3: Calculate the difference

First, find the difference: $45 - 31 = 14$.

Step4: Apply the formula

Now, plug into the formula: $\frac{14}{31} \times 100\% \approx 0.4516 \times 100\% \approx 45\%$.

Answer:

The percent increase is approximately 45%. (The option: The percent increase is approximately 45%.)