HELP ASAP What is the surface area of a pyramid?

The
square multiplied times the height
divided by 3
62.h/3

The square plus the four triangles
62 + 4 (b. 1/2)
17

You have $600,000 saved for retirement. your account earns 5.5% interest. how much, to the nearest dollar, will you be able to pull out each month, if you want to be able to take withdrawals for 20 years?

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

Can someone me with the property questions for 12 13 and 14 plz