Answer:
3.5%
Step-by-step explanation:
5% = ⁵/¹⁰⁰ and 2% = ²/¹⁰⁰
5/100 + 2/100 = 7/200 to get the proper percentage you have to divide that by 2 so 7/100 ÷ 2 = 3.5/100 or 3.5%
180 lb for an adult
A=a+b /2 times h
A=18
b = cd / a
cd / b = a
cd = a * b
we have