book Maths Puzzle Numerical Ability

Ken Griffey, Jr., is listed as being 6 ft. 3 inches tall and weighing 205 pounds. What is his BMI to the nearest 10th?

BMI = (weightinpunds)/(heightinches)^2

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book Other Question

Tom is 8. His mom is 31. How long before she is twice his age? h=192+64t-16t^2 tells the height in feet of a stone t seconds after it is thrown from the top of the building.
a.) what is the height of the stone after three seconds?
b.) At wha