![adeline12401](/avatars/13162.jpg)
adeline12401
12.09.2019 •
Mathematics
The qualifying time for the race is set at 37.895 seconds. if the track is 2.5 miles,how many feet per seconds was the driver going? . and how many miles per hour?
(5280 feet in 1 mile).
Solved
Show answers
More tips
- C Computers and Internet 3D Glasses! What is this thing?...
- C Computers and Internet How to insert videos into LiveJournal?...
- C Computers and Internet How Much Does an iPhone Cost in America?...
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- F Family and Home Parquet or laminate, which is better?...
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
- T Travel and tourism Maldives Adventures: What is the Best Season to Visit the Luxurious Beaches?...
- H Health and Medicine Kinesiology: What is it and How Does it Work?...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
Answers on questions: Mathematics
- M Mathematics My age is 20 I am girl I have to make friends on Inst agram my inst agram I d is mahir_a5564...
- M Mathematics The average life of an automobile tire of a certain manufacturer follows a Normal distribution, with a mean of 32,000 miles and a standard deviation of 1,250. Use the z-table...
- M Mathematics Describe who is responsible for the cost and efficiency variances for direct materials, direct labor, and manufacturing overhead...
- M Mathematics काव्यांश पर आधारित प्रश्न 1. निम्नलिखित काव्यांश को ध्यानपूर्वक पढ़कर पूछे गए प्रश्नोंके उत्तर दीजिएहरि हैं राजनीति पढ़ि आए।समुझी बात कहत मधुकर के, समाचार सब पाए।इक अति चतुर...
- M Mathematics The value of the correlation coefficient r is useful indicator of the strength of an association between two variables when 1) one variable is numerical and the other is nominal...
- M Mathematics Find the volume of this cylinder. ASAP...
- M Mathematics What is the area of the polygon given below?...
- M Mathematics The prices of paperbacks sold at a used bookstore are approximately Normally distributed, with a mean of $7.85 and a standard deviation of $1.25. Use the z-table to answer the...
- M Mathematics A survey found that 8 out of 10 parents approved of the new principal’s performance. If 4 parents name are chosen with replacement what is the probability they all approve of...
- M Mathematics Which graph shows a dilation?...
Ответ:
Step-by-step explanation:
There are two parts to this problem:
compute the speed from distance and timeexpress it in appropriate units.As you can learn from any speed limit sign, speed is in units of distance per time--miles per hour in the US. To compute speed, you divide distance by time.
If we were to use the given numbers directly, dividing distance in miles by time in seconds, our speed would have units of miles per second. In order to change the units to the ones asked for by the problem statement, we need to make one of two conversions.
For the first part, we need to convert miles to feet, so our speed is in feet per second instead of miles per second. For the second part, we need to convert seconds to hours, so the speed is in miles per hour.
__
Any units conversion can be done using a conversion factor that is a fraction that has a value of 1. That is, its numerator is equal to its denominator.
For the conversion from miles to feet, we want to cancel units of miles and leave units of feet. The operation on units looks like ...
The units of miles in the numerator cancel the units of miles in the denominator, so we're left with feet per second, as we want. In order to make the conversion factor have a value of 1, it must be ...
(5280 ft)/(1 mi) . . . . . . numerator equal to denominator
(a) Express the speed in ft/s:
(2.5 mi)/(37.895 s) × (5280 ft)/(1 mi) = 2.5·5280/37.895 ft/s ≈ 348.331 ft/s
__
(b) For the conversion to miles per hour from miles per second, we need to cancel the units of seconds in the denominator and replace them with hours. The conversion factor for that is ...
(3600 s)/(1 h) . . . . . . numerator equal to denominator
(2.5 mi)/(37.895 s) × (3600 s)/(1 h) = 2.5·3600/37.895 mi/h ≈ 237.498 mi/h
Ответ:
3 is constant
Step-by-step explanation:
3 is constant because it cannot change