Suppose an average person blinks 15 times per hour. How many times does an average

Question

person blink in a year? Write the answer in scientific notation (Hint: 1 year = 365 days, 1 day =
24 hours). (1 point)

Answer 1

To calculate the number of times an average person blinks in a year, we start by determining the total number of hours in a year.

1. Calculate the total hours in a year:

\[ \text{Total hours in a year} = 365 \text{ days/year} \times 24 \text{ hours/day} \] \[ = 8760 \text{ hours/year} \]

2. Calculate the total blinks in a year:

If an average person blinks 15 times per hour, then in a year, they would blink:

\[ \text{Total blinks in a year} = 15 \text{ blinks/hour} \times 8760 \text{ hours/year} \] \[ = 131400 \text{ blinks/year} \]

3. Convert the total blinks to scientific notation:

To express 131400 in scientific notation, we write it as:

\[ 1.314 \times 10^5 \]

So, the average person blinks approximately \( 1.314 \times 10^5 \) times in a year.