Jenna multiplied four numbers together and then divided by -2. the result was a positive value.
which of the following statements must be true?
a: none of the factors were negative.
b: all of the factors were negative.
c: an odd number of factors were negative.
d: an even number of factors were negative.

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations