we are given
exterior angle is 18
so,
![\theta=18](https://tex.z-dn.net/?f=%20%5Ctheta%3D18%20)
now, we can use formula
number of sides of regular polygon = 360/(exterior angle)
so, we get
![n=\frac{360}{18}](https://tex.z-dn.net/?f=%20n%3D%5Cfrac%7B360%7D%7B18%7D%20%20)
![n=20](https://tex.z-dn.net/?f=%20n%3D20%20%20)
so, number sides is 20..........Answer
The problem is that 7^2 is 7*7, and the same for 8^2. The right answer is the square root of 15, or 3.87
Answer:
B
Step-by-step explanation:
Compatible numbers are numbers that are close in value to the actual numbers and easy to add, subtract, multiply, or divide mentally. They are useful in estimating the sum, difference, product, or quotient.