3. the function f(x) = -4x2 represents the path of a whale as it surfaces for air and
dives again. select all the observations that are true about the whale's path.

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

20 feet per second

hope i

-lavira : )