Find the sum of the fist 8 terms in the sequence?

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.