RJ ran 5 miles after school. He ran the first mile in 8 minutes, the second mile in 9 minutes the third mile in 8 minutes, the fourth mile in 10 minutes, and the fifth mile in 9 minutes What was the average time it took RJ run one mile?

answer: finding the extract measurements and knowing the points

step-by-step explanation:

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

answer: b.36 feet

step-by-step explanation:

the answer is  

a.

4,624π mm2

step-by-step explanation: