4 + (-1) i
First find r
= sqrt(4^2 +(-1)^2) = sqrt 17
find theta tan theta = -1/4 theta = ~346 degrees
sqrt17 (cos 346 - i sin 346)
For the light gray frame of width 1
2 x l x 1 + 2 x w x1 = area = 100
2l = 100- 2w
now increase l and w by 2 each
2(l+2) x 1 + 2(w+2) x 1 = ?
2l + 4 + 2w +4 =? sub 2l = 100-2w
100-2w + 4 + 2w +4 =?
100+8 = 108 sq inches
Add up all of the surface areas of the prisms then subtract ( the areas where they are touching x 2)
35 *x = 120-35
x = 2.428= 242.8 % mark up
30% 0ff means you pay 70% of original price
.7(32.25) = $22.58
.7 (12)= $8.40 total $ 30.98
Value = 649.82 (1-.63)^t
200 = 649.82 (1-.63)^t
200/649.82 = (.37)^t
.3077 = .37^t
log .3077 / log.37 = t=1.19 yrs 1 yr 68 days
The cheapest one will require the largest mark-up to get to $1 profit
Spin top @ 1.50 is the cheapest and requires a 67% mark up.
Diagram: Haha.....
OK....I see that now
5x = 40 degrees (since the opposite sides are =)
180 degrees in a triangle so 40 + 40 + 2y+20 = 180 solve for y = 40
Can you prop them up like a tent?
Or if you want you can lay one across a corner...then place the other on it to the other side.....(to get to the castle)
