Multiply the radius by 2 that make the diameter 18 then multiply 18 by 3.14 which equals about 56.54 inches
Davie will take 80/20= 4 hours to finish the tour. Horatio has only 2 and 1/2 hours to cover the same 80 miles. (80)/(2.5)= 32 miles per hour.
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5x+x=90 degree
x=90\6
x=15
5x=15*5=75
75+15=90degree
