Answer:
Scientists can tell by observing the seismic waves that are recorded all over the surface of the earth from distant earthquakes. The seismic waves are reflected (bounced off) layers of different density, and they are refracted (bent) when they enter layers of different density.
Answer:
I think its the lifo method im not sure but i had a question like this in class
1 sec=1/10 m
5 min=300 sec
thus, 1/10 *300
=30 m
He will walk 30m in 5 min
Hey there! I'm happy to help!
If you raise a fraction to an exponent, you apply that exponent to the numerator and the denominator. This would give us 
.
Have a wonderful day! :D
Answer:
20 (minutes)
Step-by-step explanation:
Look at the first columns, and it tells us that Charlie runs 2 laps in 8 minutes. Then simply divide by two, then you'll get that Charlie runs 1 lap in 4 minutes. So for five laps, multiply 4 by 5, which is 20.
