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Sagot :
Answer:
Step-by-step explanation:
A) Divide both sides of equation by t to isolate r. Then, r = d/t
- d=rt
- d/t = rt/t
- d/t = r
B) Plugging in the given numbers, solve:
d = distance which is 760,320 yards
r = rate which is unknown
t = time which is 2 hours.
- r = d/t
- r = 760,320 yards / 2 hours
- r = 380,160 yards per hour
C) The conversion from yards to miles, 1 yard = 1760 miles. So, multiply by the previous answer in (B) by the two ratios or just divide:
- 380,160 yards / 1760 miles = 216 miles per hour
D) Use miles in this scenario because of the number of significant digits (yards would require a number in the hundred-thousands).
Answer:
Step-by-step explanation:
A
d = r * t Divide by t
r = d/t
B
d = 760320 yards
t = 2 hours
r = 760320 / 2
r = 380160 yards / hour
C
1 mile = 1760 yards
So divide 380160 by 1760 to get miles per hour.
r = (380160 / 1760) / hour
r = 216 miles per hour.
D
Use miles. We can relate to miles more easily. Cars can travel 100 miles per hour. This plane goes slightly twice more than a car. We have no idea what to relate yards to. Try football fields which about 100 yards
That means that 380160 / 100 = 3802 football fields can be travelled in an hour. Does that make any sense to you? It does not to me.
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