Question 144494
One way to gauge whether a person may need to gain or lose weight is to use the body-mass index, which is calculated using the formula B=705w/h^2, where w is the weight in pounds and h is the height in inches.
Doctors recommend that body-mass index values fall between 19 and 25.
If a person is 6 ft 3 in. tall and has a body-mass index of 23, what should his or her weight be? (Round to the nearest pound.)
:
Convert 6'3" to inches: 12*6 + 3 = 75"
:
{{{705w/75^2}}} = 23
{{{705w/5625}}} = 23
705w = 23 * 5625
:
705w = 129375
w = {{{129375/705}}}
w = 183.51 ~ 184 lb