Answer:
140 inches
Step-by-step explanation:
one decagon has 10 sides
14*10= 140
We have to prove that the tangent is an odd function.
If the tangent is an odd function, the following condition should be satisfied:

From the figure we can see that the tangent can be expressed as:
We can start then from tan(t) and will try to arrive to -tan(-t):

We have arrived to the condition for odd functions, so we have just proved that the tangent function is an odd function.
Answer:
left handed: right handed
1 : 8
Step-by-step explanation:
1 out of every 9 people are left handed
9-1 = 8
That means 8 of the 9 are right handed
left handed: right handed
1 : 8
Answer:
c
Step-by-step explanation: