Please help with this

Answer:
4.8 if you round it to the tenths place
the whole answer is 4.887739763939
Step-by-step explanation:
You need to find the hypotenuse..which is 's'
Following the rule a^2 + b^2 = c^2
It leads us with 2.5^2 + 4.2^2 = c^2
Therefore 6.25 + 17.64 =c^2
6.25 + 17.64= 23. 89
You square root the numbers and..
[tex] \sqrt{23.89} = 4.8[/tex]