- #1

ncr7

- 41

- 0

I got the first 2 but when I went to find c I can't seem to get it.

I took

10m/s = sqrt((5.6t - 4.5t^2)^2 + (8.2)^2

10^2 = (sqrt((5.6t - 4.5t^2)^2 + (8.2)^2)^2

100 = (5.6t - 4.5t^2)^2 + 67.24)

32.76 = (5.6t - 4.5t^2)^2

sqrt(32.76) = sqrt((5.6t - 4.5t^2)^2)

5.72 = 5.6t - 4.5t^2

0 = -4.5t^2 + 5.6t - 5.72

then I used quadratic to find out the two values...

but I get a negative in the sqrt on the quadratic and I can't do that... any suggestions?