N4n3 2m 6m 5n 2n
identify like terms

2n, 5n, n

2m, 6m

4n3

Letters are grouped together, except for when they have exponents. Numbers with the same letter and exponent can be grouped together though (ex. 4n3 and 9n3) Hope this helps!

part 1 answer = 8

part 2 answer = 72

step-by-step explanation:

part 1 explanation = add all of the numbers, then divide by how many numbers you have. so, 200/25 = 8.

part 2 explanation = not gonna lie, this is hard to explain, so just google how to do it.

e^-kt = n/n0 = 0.79  

-kt = ln 0.79  

t = - ln 0.79/0.0001  

= 2357 years

step-by-step explanation: