Answer:
13.6 hours
Step-by-step explanation:
To find the mean you first add all the numbers together, in this case 68. Then you have to divide this by the number of scores you added, which is 5. So 68/5= 13.6
it is becuse you do 13-4 which would give you nine.
TT = 3.14
The answer is 37.68 if TT is 3.14
A. it forms a triangle
Two angles are Complementary when they add up to 90°.
Therefore
