Aprofessional driver drove a long linear route at an average speed of 30 miles per hour. immediately after completing this drive, the driver turned around drove back on the same route at an average speed of 70 miles per hour. if the round trip took 2 hours, how many miles long is this route?

The route was 42 miles long.

Explanation:

Let the distance covered from starting point to end point be x.

Average speed of the car = 30 mile/hour

Time taken to cover x distance = t

The distance covered from end point point to starting point back = x

Average speed of the car = 70 mile/hour

Time taken to cover x distance = t'

Average speed of the car:

Total time taken in round trip  = 2 hours

Total distance covered by car= 42 mile/hr × 2 hr = 84 miles

Distance of the route = 84 ÷ 2 = 42 mile

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2