In terms of I, what is the area of the given circle​

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

With these: 18/36 = 1/? missing number change 1 5/8 to improper fraction. change 19/5 to a mixed number.

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.