Shaun Alexander makes a 75-yard touchdown run in 9 seconds. What is his speed? (Give your answer in ft/second. 1 yard = 3 ft)

25 ft/s

Explanation:

(assuming his speed is constant and in a straight line)

1 yd = 3 ft

75 * 3 = 225 ft

Speed = Distance/time

225/9 = 25 ft/s

25 ft/s

Explanation:

a

explanation:

because they are cartillidge

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.