9=t/5
times both sides by 5
45=t
A^2 + b^2 = c^2
9^2 + 2^2 = c^2
81 + 4 = c^2
85 = c^2
take the square root of 82 which equals 9.05538…
if it wants a whole number then 10, but if it wants a decimal, the. 9.6 ft.
if you need more detail lmk :)
423.52 m should be the right one
First The rectangle part with the length is 105m, so you add 105 with 105 that make 210.
For the semicircle part,
we need to find the circumference of the circle
C = 2*pi*r ==> semi Circle circumference = 1/2(2*pi*r) = pi*r
68 is diameter ==> radius should be 34, and the Circumference of 1 semicircle should be 34*pi. We have 2 semicircles, so 2 have 68*pi
In the end Total perimeter = 210 + 68*pi = 423.52
Idk how to do this but if you use socratic you can take a picture of the question and it usually comes up with an answer