Answer:
4
Step-by-step explanation:
b = 15.59
a^2 + b^2 = c^2
9^2 + b^2 = 18^2
81 + b^2 = 324
<u>-81 -81 </u>
b^2 = 243
5.6 - 4.8 = 0.8
Answer: a
2x=2
x= ==> Period: ==> a
