Question

The volume of air an adult's lungs can hold decreases with age. The

formula V = 0.104h-0.018a-2.69 estimates air volume “V” (in liters) of a
person's lungs for someone of height “h” inches and age “a”years. Solve this
formula for age “a”.

Answer 1

`\sf a =(0.104h - V - 2.69)/(0.018)`

Explanation:

• To make 'a' as the subject of the formula, first isolate the term with 'a'.

0.104h - 0.018a - 2.69 = V

• To isolate the term with 'a', subtract 0.104h from both sides and add 2.69 to both sides,

-0.018a = V - 0.104h + 2.69

• Now, divide both sides by (-0.018),

`\sf a = (V-0.104h+2.69)/(-0.018)\\\\\\a = (-V +0.104h -2.69)/(0.018)\\\\\\\boxed{\bf a = (0.104h - V - 2.69)/(0.018)}`