Water makes up 3.4 of a person's weight. If a student weighs 100 lbs., how much of his weigh is water?

75

Step-by-step explanation:

To determine how much of a persons weight is water, multiply 3/4 by their weight.

weight of water =  weight x 3/4                              

100 x 3/4 0r 100 x 0.75 ( same thing)

75

The student weighs 75 lbs underwater

P.S it's not 3.4 it's 3/4 = 75% of our body is made up of water.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

6(h+1)/2=a

a=area

step-by-step explanation:

its the same thing as a square or rectangle but after multiplying two sides you need to divide it by two.