A rain drop hitting a lake makes a circular ripple. If the radius, in inches, grows as a function of time in minutes according to r(t) - 20vt + 2, find the area of the ripple as a function of time. Find the area of the ripple at t = 2.​

a. the residual plot for model 1 has a random pattern and is a good fit for the data.

the answer is 62

chad should not have included the values (1, 2) and (3, 6) because that would mean he only had half a healing card.

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