Aperson standing at point c measures the angle of elevation to a point, a, at the top of a perpendicular cliff, to be 18°. after moving 2,200 feet directly toward the foot of the cliff, the person measures the angle of elevation to point a as 56°.
the height of the cliff is feet.

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?