Explain tge distace formula. then use it to calculate the distance between a(1,1) and b(7,-7).

The distance formula is based on the Pythagorean Theorem:

Distance = Square Root [(X2 - X1)^2 + (Y2 - Y1)^2]
Distance = Square Root [(7 -1)^2 + (-7 -1)^2]
Distance = Square Root [ 6^2 + -8^2]Distance = Square Root [ 36 + 64 ]Distance = Square Root [100 ]Distance = 10
Source:http://www.1728.org/distance.htm

Volume = Length x Width x Height

Volume = 12 x 12 x 6 = 864 m³

864 m³