Answer:
18 (to the nearest tenth)
Step-by-step explanation:
Use theorem and solve basically
Pythagorean theorem: [tex]a^{2} + b^{2} = c^{2}[/tex]
[tex]10^2+b^2= 15^2\\100+b^2 = 225\\b^2 = 225-100\\b^2 = 125\\b = \sqrt{25} \\b = 5[/tex]
Answer is 5.
