Math problem help!?

Question

I can figure everyone out but these:

Find the surface area of each regular pyramid. Round to tenth if nexessary.

1. slant hieght=5cm base= 7cm

2. Base= 6.4 m lateral face=3.2 m

3. The pyramid arena in Memphis tennessee is the third largest pyramid in the world. The base is 360,000 square feet and the pyramid is 321 feet tall. Find the lateral area of the pyramid. Assume that the base is a square.

4. Slant height 9 cm Altitude= 6 cm

5. altitude 3 cm. Slant height= 3 (square root of 2)

Thanks in advance

Answer 1

Try to do a search for online area Calculators. There are several online area calculators for these shapes.
Just plug in your numbers to get your answer. Here is one link:
http://www.easycalculation.com/area/surfaceArea.php

Answer 2

1. the formula is s^2 + 2sl (s=side, l=slant height)
so 7^2 + (2 x 7 x 5)
14 + 70= 84 square cm
2. i guess the same as one the "lateral face" throughs me off.
3. just take the last part of the equation (the part after the +) and add it to 360,000
sorry i don't get the others.