(4.3*10^4)^2 in scientific notation

Amonument at a park is in the shape of a right square pyramid. a diagram of the pyramid and its net are shown. what is the surface area of the monument? enter the answer in the box. m²

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

Solve the equation -9p - 17 =10 a -3 b. 16 c. 18 d -16