Solve for r...2

[nycmathguy]

This is it for Saturday. I posted lots of Calculus and Algebra problems for one day. My beach plan was ruined today by rain. So, why not do lots of math? Now, time to play my guitar.

 

[MathLover1]

correct

 

[nycmathguy]

correct

As Richard Cunningham would often say on Happy Days:

I'M COOKIMG WITH GAS.