What is the approximate surface area of a cylinder with a radius of 3 inches and a height of 10 inches? 1. 30in^2

2. 87in^2

3. 217in^2

4. 245in^2

For how answer my question this will be the last question can you answer in math subject

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?