ANSWER
The correct answer is 4.6
EXPLANATION

Since U is the midpoint of |RS|,

U being the midpoint of RS means, it is in the middle of R and S.
So if from R to U is 2.3, then from U to S is also 2.3.
This is an implication that


See diagram in the attachment.
Area of a Triangle = 1/2(Base times Height)
7500=1/2(200*h)
3750=100*h/2
3750/100=h/2
37.5=h/2
37.5*2=h
h=75yd
hope it helps
Answer:
11 units
Step-by-step explanation:
Given that t is on the line su , then
su = st + tu = 6 + 5 = 11