How many delegates present at the convention signed the constitution on september 17, 1787?
a. 50
c. 29
b. 42
d. 39

This question is extremely tricky. I might be wrong, but let's give it a shot.
There were 55 delegates present. Of the 55 delegates, only 41 signed their names of the constitution.. However!!! John Dickinson of Delaware was not present at the time, so he had George Read sign it for him. Making it only 39 delegates who actually physically signed the constitution. I think it is D.. 39

Answer/Step-by-step explanation:

Part A: Net A is the correct net. If we decide to fold the net, we'd get the shape of the prism. Folding back net B won't give us the shape of the prism because of the position and arrangement of the right triangular  bases.

Part B:

AB =  3in

BC = 5 in

CD = 9.4 in

Part C: surface area of the prism can be calculated by calculating the area of each part of the net, and summing them together as follows,

Area of the 2 triangular bases = 2(½*base*height of triangle) = 2(½*4*3) = 2*2*3 = 12 in²

Area of the three rectangles =

Surface area of prism = 12 + 112.8 = 124.8 in²