What is the number 5.1×10^7 written in decimal notation?(1 point)
5 answers
The number 5.1×10^7 written in decimal notation is 51,000,000.
The speed of light is about 671,000,000 miles per hour. How will you write this number in scientific notation?(1 point)
Responses
6.71 × 108
6.71 times 10 superscript 8 baseline
6.71 × 103
6.71 times 10 superscript 3 baseline
6.71 × 10−3
6.71 times 10 superscript negative 3 baseline
6.71 × 10−8
Responses
6.71 × 108
6.71 times 10 superscript 8 baseline
6.71 × 103
6.71 times 10 superscript 3 baseline
6.71 × 10−3
6.71 times 10 superscript negative 3 baseline
6.71 × 10−8
The speed of light, 671,000,000 miles per hour, can be written in scientific notation as 6.71 × 10^8.
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 × 105
1.314 times 10 superscript 5 baseline
1.314 × 104
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 × 105
1.314 times 10 superscript 5 baseline
1.314 × 104
To find the number of times an average person blinks in a year, we multiply the number of blinks per hour (15) by the number of hours in a day (24) and the number of days in a year (365).
15 blinks/hour * 24 hours/day * 365 days/year = 131,400 blinks/year
Therefore, the average person blinks 131,400 times in a year.
In scientific notation, this can be written as 1.314 × 10^5.
15 blinks/hour * 24 hours/day * 365 days/year = 131,400 blinks/year
Therefore, the average person blinks 131,400 times in a year.
In scientific notation, this can be written as 1.314 × 10^5.
1 answer