here is your answer mate.
in triangle ABC
angle ABC + angleBAC + angleACB = 180 Degrees. (angle sum property of triangle)
90 + 58 + angle ACB = 180 degree.
148 + angle ACB = 180 degree.
angle ACB = 180 - 148
angle ACB = 32 degree
the angle of elevation is 32 degrees
Circles will never have a side but they only have 1 line that can be counted as a side.
Problem A,B,C, and D can be solved using 3*6=18 or 6*3=18
Just go through it phrase by phrase by phrase - one step at a time.
2*( )
2*(x - 7)