The square root is 41.9332803391. To double check, multiply 41.9332803391 by 41.9332803391, which gave me 1758.4.
I hope this helps!
You just plug in 5 for t s (5)=-3+4 (5)^2=97
Answer: 10°C
Step-by-step explanation:

That all that information was his and safe I guess