Redraw this diagram and use Similar Triangles on the shadow Lengths to work out the Height of the mobile phone tower.

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.

Which is the correct excel formula for the 80th percentile of a distribution that is n(475, 33)? =norm.dist(80,475,33,1) =norm.inv(0.80,475,33) =norm.s.inv((80-475)/33)?

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r