SOLUTION: The body mass index is a measure of the risk of heart disease. It is given by the following formula: I = 704.5 W H2 Where W = weight in lbs and H = height in inches

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Question 84665: The body mass index is a measure of the risk of heart disease. It is given by the following formula:
I = 704.5 W
H2 Where W = weight in lbs and H = height in inches
An index greater than 25% indicates that a person IS at risk for a heart attack. If Mary’s height is 65 inches what should her weight be maintained at or under?

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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The body mass index is a measure of the risk of heart disease. It is given by the following formula:
I = 704.5 W
H2 Where W = weight in lbs and H = height in inches
An index greater than 25% indicates that a person IS at risk for a heart attack. If Mary’s height is 65 inches what should her weight be maintained at or under?
:
I am going to assume that the formula should be:
I = 704.5W%2FH%5E2;
:
Find W
704.5W%2F65%5E2 =< 25
704.5W%2F4225 =< 25
:
Multiply both sides by 4225 and you have:
704.5W =< 25*4225
:
704.5W =< 105625
:
Divide both sides by 704.5 and you have:
W =< 105625%2F704.5
W =< 149.9 lb:
:
:
Check solution on good calc: enter: (704.5*149.9)/65^2 = 24.995 ~ 25%