Answer:
The 1st one for the first pic and I'm not sure but c for the 2nd one
N=90 you have to simplify both sides then isolate the variable :)
Yes because it is just milk and a substance in the milk
If you can find an explicit formula for a sequence, you will be able to quickly and easily find any term in the sequence simply by replacing n with the number of the term you seek. An explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location).
