Question

Question
Suppose an average person blinks 15 times per hour. How many times does an average person blink in a year? Write the answer in scientific notation (Hint: 1 year = 365 days, 1 day = 24 hours).(1 point)
Responses

1.314 × 10−5
1.314 times 10 superscript negative 5 baseline

1.314 × 10−4
1.314 times 10 superscript negative 4 baseline

1.314 × 104
1.314 times 10 superscript 4 baseline

1.314 × 105

Answer 1

To find how many times an average person blinks in a year, we first calculate the total number of hours in a year and then multiply that by the average number of blinks per hour.

1. Calculate the number of hours in a year:
\[
\text{Number of days in a year} = 365 \text{ days}
\]
\[
\text{Number of hours in a day} = 24 \text{ hours}
\]
\[
\text{Total hours in a year} = 365 \times 24 = 8760 \text{ hours}
\]

2. Calculate the total number of blinks in a year:
\[
\text{Blinks per hour} = 15
\]
\[
\text{Total blinks in a year} = 15 \times 8760
\]
\[
= 131400
\]

3. Convert this to scientific notation:
\[
131400 = 1.314 \times 10^5
\]

Thus, the answer is **1.314 × 10^5**.