Area of decagon is given by:
Area=1/2(nsr)
where:
n=number of sides
s=side length
r=height
thus the area will be given by:
Area=1/2(10*4*6.2)
Area=124 cm^2
For this case we must find

By definition we have to:

We have the following functions:

Now, applying the given definition, we have:

Answer:

Answer: it is 49 or -49
Step-by-step explanation:
if you divide 49 by 7 it comes out to seven because 7 times 7 is 49.
How do you reverse division? You multiply. So, the answer is multiplying by 28.