The kentucky derby, the first leg of horse racing’s triple crown, was won by a time of 122.2 s. if the race covers 2011.25 m, what was the average speed in a) m/s and b) in mi/h?
20 extra points!

a) b)

Explanation:

The average speed is given by the formula:

The distance covered is 2011.25m , and the time is 122.2s.

Replacing in the formula:

Resulting in a) .

To get the result in mi/h, do the following conversion:

Knowing : 1 mi = 1603 m   and  1 h = 3600 seg

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.