A model airplane flies 18 feet in 2 seconds. what is the airplane's speed in miles per hour? round your answer to nearest hundredth.
1 hour = 60 * 60 = 3,600 seconds
Solve this proportion.
18/2 = x/3,600
https://www.mathsisfun.com/algebra/proportions.html
18 ft/ 2 sec
= (18/5280) miles / (2/3600) hrs
= (18/5280)(3600/2) mph
= appr 6.14 mph
approx 16.4 mph
To find the airplane's speed in miles per hour, we need to convert feet per second to miles per hour.
First, let's convert the distance traveled from feet to miles. Since 1 mile is equal to 5280 feet, we divide the distance traveled in feet (18 feet) by 5280 to get the distance in miles.
Distance in miles = 18 feet / 5280 feet/mile
Next, we will convert the time from seconds to hours. Since 1 hour is equal to 3600 seconds, we divide the time in seconds (2 seconds) by 3600 to get the time in hours.
Time in hours = 2 seconds / 3600 seconds/hour
Now, we can calculate the speed in miles per hour by dividing the distance in miles by the time in hours.
Speed in miles per hour = Distance in miles / Time in hours
Plugging in the values we calculated,
Speed in miles per hour = (18 feet / 5280 feet/mile) / (2 seconds / 3600 seconds/hour)
Simplifying,
Speed in miles per hour = (18/5280) / (2/3600)
Dividing the fractions,
Speed in miles per hour = 0.003409091 / 0.000555556
Speed in miles per hour = 6.13 miles per hour (rounded to the nearest hundredth)
Therefore, the airplane's speed is approximately 6.13 miles per hour.