How do I solve for t?

Question

I did the math for a physics problem, and got -1.225=.5(-9.8)t^2. The answer sheet says this is correct, and puts the result as .5. However, I don't see how to find this. I've used my knowledge of how algebra works, to no avail. How would I solve this problem, to isolate and solve for t?

 

Thanks in advance.

Answer 1

-1.225 = 0.5(-9.8)t²

-2.45 = -9.8t²

0.25 = t²

25/100 = t²

5/10 = t

0.5 = t

 

Me too!