Amanda can run 4/5 of a mile in 9 minutes.Express her speed as a unit rate in miles per hour.
speed=distance/time=.8mile/9min*60min/hr=48/9 mi/hr=5.33 mi/hr
To express Amanda's speed as a unit rate in miles per hour, we need to convert the time from minutes to hours.
There are 60 minutes in 1 hour, so we can divide 9 minutes by 60 to get the time in hours:
9 minutes ÷ 60 = 0.15 hours
Now, we can calculate the unit rate by dividing the distance in miles by the time in hours:
(4/5) mile ÷ 0.15 hour = (4/5) ÷ 0.15 mile/hour
To simplify this, we can multiply the numerator and denominator by 20:
(4/5) ÷ 0.15 mile/hour = (4/5) × (20/3) mile/hour
= 80/15 mile/hour
Simplifying the fraction, we get:
80 ÷ 15 = 5 and a remainder of 5
Therefore, Amanda's speed is approximately 5 and 5/15 or 5 and 1/3 miles per hour.
To express Amanda's speed as a unit rate in miles per hour, we need to convert the time from minutes to hours and the distance from miles to hour.
First, let's convert the time from minutes to hours:
Since there are 60 minutes in an hour, we divide the given time of 9 minutes by 60 to get it in hours:
9 minutes ÷ 60 = 0.15 hours
Now let's convert the distance from miles to hours:
Amanda can run 4/5 of a mile in 0.15 hours.
To find the unit rate, which represents miles per hour, we divide the distance by the time:
Distance ÷ Time = Unit Rate
4/5 ÷ 0.15 = 2.67
Therefore, Amanda's speed as a unit rate is approximately 2.67 miles per hour.
1 h = 60 min
Speed = ( 4 / 5 ) mile * 60 min / 9 min
Speed = ( 4 / 5 ) * 60 / 9 =
4 * 60 / 5 * 9 =
240 / 45 =
2 * 2 * 2 * 2 * 3 * 5 / ( 3 * 3 * 5 ) =
2 * 2 * 2 * 2 / 3 =
16 / 3 miles / hour