1/2 x 1 2/3 write the answer as a fraction or as a whole or mixed number

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0

In the diagram, a building cast a 35-ft shadow and a flagpole casts an 8-ft shadow. if the the flagpole is 18 ft tall, how tall is the building? round the the nearest tenth.