Answer: Well theres no table added but it probably looks like this
X Y
8mph 4 min
2mph 1 min
I think you can do the rest
Answer:
70
Step-by-step explanation:
(5x2) x 7
(10) x 7 = 70
Answer:
its B
Step-by-step explanation:
Answer:
Problem 1) frequency: 160 heartbeats per minute, period= 0.00625 minutes (or 0.375 seconds)
Problem 2) Runner B has the smallest period
Problem 3) The sound propagates faster via a solid than via air, then the sound of the train will arrive faster via the rails.
Step-by-step explanation:
The frequency of the football player is 160 heartbeats per minute.
The period is (using the equation you showed above):

second problem:
Runner A does 200 loops in 60 minutes so his frequency is:
loops per minute
then the period is: 0.3 minutes (does one loop in 0.3 minutes)
the other runner does 200 loops in 65 minutes, so his frequency is:
loops per minute
then the period is:

Therefore runner B has the smaller period
To find the perimeter you do length + width so you do 12.4 + 5.9 to get the perimeter.