Problem

With aging, body fat increases and muscle mass declines. The line graphs show the percent...

With aging, body fat increases and muscle mass declines. The line graphs show the percent body fat in adult women and men as they age from 25 to 75 years. Use the graphs to solve Exercises.

Source: Thompson et al., The Science of Nutrition , Benjamin Cummings, 2008

The function p(x) = −0.004x2 + 0.25x + 33.64 models percent body fat, p(x), where x is the number of years a person’s age exceeds 25. Use the graphs to determine whether this model describes percent body fat in women or in men.

Here is the 2011 Federal Tax Rate Schedule X that specifies the tax owed by a single taxpayer.

If Your Taxable Income Is Over	But Not Over	The Tax You Owe Is	Of the Amount Over
$ 0	$ 8500	10%	$ 0
$ 8500	$ 34,500	$ 850.00 + 15,	$ 8500
$ 34,500	$ 83,600	$ 4750.00 + 25,	$ 34,500
$ 83,600	$174,400	$ 17,025.00 + 28,	$ 83,600
$174,400	$379,150	$ 42,449.00 + 33,	$174,400
$379,150	—	$110,016.50 + 35,	$379,150