Question

Plz Help!

Answer 1

?

Answer 2

19, 20, or both?

Answer 3

Both

Answer 4

19) You have two similar triangles (the tree heights, the length of the shadows, and the Sun's rays). The first triangle has side lengths of 2 ft., 2.4 ft., and z (which we can ignore in this question). The second triangle has side lengths of x (which we need, the tree's height), 45 ft., and z (once again, ignore). Because the triangles are similar, you can set up a ratio to compare the sides you have, which would be 2 ft./2.4 ft. = x ft./45 ft. If you multiply both sides by 45 you get 90/2.4=x which is equal to 37.5, so your big tree should be 37.5 ft. tall.

20) Same scenario as the first, except with two ratios. First, for side a, we can use 7/6=a/9. Multiply both sides by 9 to get a=63/6=10.5. Same for b, but with b's values. 3/6=b/9 -> 27/6=b=4.5, so your answers would be a=10.5 and b=4.5

Answer 5

Thanks