Question

a certain patients body is 72% water. if the patient weighs 178 lb. how many pounds of water is in this patients body? round your answer to the nearest tenth percent.
1 24.7 lb
2 128.1 lb
3 2.5 lb
4 128.2 lb

Explanation:

Step1: Convert percentage to decimal

To find the amount of water, we first convert 72% to a decimal. 72% = 0.72.

Step2: Calculate water weight

We multiply the patient's weight (178 lb) by the decimal - equivalent of the percentage of water in the body. So, the weight of water = 178×0.72 = 128.16 lb.

Step3: Round the answer

Rounding 128.16 lb to the nearest tenth gives 128.2 lb.

Answer:

D. 128.2 lb