A helicopter is hovering at a point lying in the same vertical plane as two other points P and Q on the horizontal ground. Its distances from P and Q are 850 m and 1200 m respectively. Given that the angle of elevation from Q is 43°, find PQ correct to 3 significant figures.

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.

Pamela has a 30-year, 5.75% mortgage on her $250,000 home. she has been paying on it for 5 years, and has recently hit some financial trouble. if her lender agreed to lower the interest rate on her $231,905.47 balance to 5.5%, what will her new payment be for the remainder of the loan?

Which of the following is true about the following construction of a tangent to a circle from a point outside of the circle?