Answer:
Explanation:
Let's do this step by step!
The hyponteuse is 7.7 because it is the longest side of a 90 degree angle. 
the formula for this would a^2 + b^2 = c^2 
 3.3^2 + b ^2 = 7.7^2 
 10.89 + b^2 = 59.29 
- 10.89 - 10.89 subtract from both sides
 b^2 = 48.4

b = 6.95701085237
round to the nearest tenth ---> 7