0=40-10t-5t^2
t^2+2t-8=0
(t+4)(t-2)=0
t=-4 (not a solution) or t=2
Answer: after 2 seconds
12: twelve
1 rod(10 blocks)
2 cubes(2 singles blocks)
area of the parallelogram is: b x h
12 x 4 = 48 (d)
Neither...
205/1000 equals .205
So they are both the same.
Hope this helps -J
