Atree that is 100 feet tall casts a shadow that is 150 feet long. determine the angle at which the rays of the sun hit the ground, to the nearest degree.

34°

Step-by-step explanation:

Let θ = the angle of elevation from the ground to the top of the tree. Then

tanθ = 100/150 = 0.6667

     θ = arctan0.6667

     θ = 34°

The sin's rays hit the ground at an angle of 34°.

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!