First, find the radius of the circle. The radius of a circle is half the diameter. r=13/2=6.5
Second, use the equation A=pi * r^2 to find the area of the circle.
A=(3.14) * (6.5^2) = 132.665m^2
so the answer is 132.7 m^2.
Answer:

Step-by-step explanation:
Let be
, this expression is simplified by algebraic and trascendental means. As first step, the second order polynomial is simplified. Its roots are determined by the Quadratic Formula, that is to say:


The polynomial in factorized form is:

The function can be rewritten and simplified as follows:
![f(x,y) = \log_{4} [(x-5-\sqrt{25-6\cdot y})\cdot (x-5+\sqrt{25-6\cdot y})]](https://tex.z-dn.net/?f=f%28x%2Cy%29%20%3D%20%5Clog_%7B4%7D%20%5B%28x-5-%5Csqrt%7B25-6%5Ccdot%20y%7D%29%5Ccdot%20%28x-5%2B%5Csqrt%7B25-6%5Ccdot%20y%7D%29%5D)

Answer:
A. 45.7
Step-by-step explanation:
Side a = 8
Side b = 7.8
Side c = 11.17318
Angle ∠A = 45.725° = 45°43'31" = 0.79806 rad
Angle ∠B = 44.275° = 44°16'29" = 0.77274 rad
Angle ∠C = 90° = 1.5708 rad = π/2
Answer:
32%
Step-by-step explanation:
<h3>Given that:</h3>
- Jackie is saving money to buy a new cell phone.
- The cell phone costs $175
- she has already saved $56
<h3>To find:</h3>
- The percent of the cost of the cell phone has Jackie saved
In order to find the percent of the cost of the cell phone has Jackie saved,
- divide the cost of the cell phone by the amount of the money Jackie saved
- Multiply the result (1) by 100
See below how it's done:

dividing yields:

multiplying yields:

Alternative:
Instead of dividing,we can consider reducing the fraction and multiply that with 100 to get the answer.

In conclusion:
Jackie has saved 32% of the cost of the cell phone
2x + 3z = 12 <span>and z = -2, then x=6
</span><span>
2x + 3(-2) = 12
2x = 18
x = 9
answer
False </span>