Answer:

Step-by-step explanation:
Given
--- First, term
--- Fourth term
Required: Determine the common ratio
The nth term of a GP is

Substitute 4 for n


Substitute 648 and 3 for T4 and 3 respectively.


Take cube roots of both sides
![r =\sqrt[3]{216}](https://tex.z-dn.net/?f=r%20%3D%5Csqrt%5B3%5D%7B216%7D)

<em>The common ratio is 6</em>
Answer:
Area = length * width
112 = (2w+2)*w
112 = 2w^2 + 2w
0 =2w^2 + 2w - 112
0 = w^2 + w - 56
0 = ( w + 8 )( w - 7 )
w+8=0 results in negative measures
w-7=0 --> w = 7
width is 7
length is 16
Answer:ur answer is 96
Step-by-step explanation:
Answer:

Step-by-step explanation:
we know that
The formula of law of cosines is equal to

where
a, b and c are sides. C is the angle opposite side c
In this problem we have

substitute the given values





