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Ok, thanks, let me watch that and start working on them. Be right back. Then I'll show you my work.

ok, so I think I'll start with 15 minutes, and add 5.

ok

ok

For part 2, how should I choose numbers to make it a geometric sequence?

did you finish part 1. what is \(a_7\) ?

it's 45, right?

can you show your work?

\[ a_7= 15 + (7-1) \cdot 5 \\ = 15+6\cdot 5 \\=15+30 \\=45\]

ok, that's what I have

ok

I think I will do a factor of 2, as that will be an easier number to work with

Use this formula to find the "nth term" (n=5 for your problem)
\[ a_n= a_1 \cdot r^{(n-1)} \]

people usually use r as the factor we multiply by. in your problem you are using r=2

ok, let me work on that

ok, thank you!