On average the human body is more than 50 percent water [by weight]. runners and other endurance athletes average around 60 percent. this equals about 120 soda cans' worth of water in a 160-pound runner! investigate their calculation. approximately how many soda cans’ worth of water are in the body of a 160-pound runner? what unprovided information do you need to answer this question?

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

6 equilateral triangles