I think it's the third 4 ( а² + 2а ) + 9
The solutions are C = 2 and C = -2
We can find this by solving for C.
C^2 - 4 = 0 ----> add 4 to both sides
C^2 = 4 ----> Take the square root of both sides
C = 2
However, since we used the square root function, we have to include a negative form of the answer as well as the positive one we found.
Step-by-step explanation:
PART A: The area of a circle is radius squared times pi. To estimate the radius, you have to divide the area by pi (estimate 3.14) and then find the square root of the quotient
600/3.14=191.0828...
Square root/radius is about 13 sq feet
PART B:
Now use the pi button instead of 3.14 and do the same thing.
Square root/radius is about 16.9 feet
PART C: Since it's the radius squared and you are doubling it again, it would be radius squared times radius squared, or radius to the fourth power...meaning the area would quadruple.
Reasoning is valid. Area if radius was doubled would be about 3589 feet. ROund to 3600, which divided by 900 is 4
To add fractions, find the LCD - lowest common denominater, and then Combine. For LCD find where both bottom numbers equal the same so in this case you would have to multiply 9 times 11 and vice versa to equal 99. Once you do that the 5 thats on top of the 9 will also have to be multiplied by 11 and the 4 on top of the 11 will have to be multiplied by 9 so it could make sense. Now you must Combine - it would be 55/11 + 36/11. you only add the top numbers and leave the bottom number.(that is what its out of). Thus the answer is 91/11.
Answer is 99
