Answer:
D
Step-by-step explanation:
So we have the expression:
![(x-y)^2+10wz](https://tex.z-dn.net/?f=%28x-y%29%5E2%2B10wz)
And we want to evaluate it when x=25, y=10, w=11, and z=18.
So, substitute these values for the variables:
![=(25-10)^2+10(11)(18)](https://tex.z-dn.net/?f=%3D%2825-10%29%5E2%2B10%2811%29%2818%29)
First, subtract within the parentheses:
![=(15)^2+10(11)(18)](https://tex.z-dn.net/?f=%3D%2815%29%5E2%2B10%2811%29%2818%29)
Square 15:
![=225+10(11)(18)](https://tex.z-dn.net/?f=%3D225%2B10%2811%29%2818%29)
Now, multiply the terms on the right. 10 times 11 is 110:
![=225+110(18)](https://tex.z-dn.net/?f=%3D225%2B110%2818%29)
Multiply:
![=225+1980](https://tex.z-dn.net/?f=%3D225%2B1980)
Finally, add:
![=2205](https://tex.z-dn.net/?f=%3D2205)
So, our answer is D.
And we're done!
33.3% is the answer, I think
20/60 ---> 1/3, covert this to a percentage and it equals 33.3%
The true statement about the Internet connection cost is D. Any amount of time over an hour and a half would cost $10.
<h3>How to explain the cost?</h3>
In this situation, the function is f (t), when t is a value between 0 and 30. The cost is $0 for the first 30 minutes
When t is a value between 30 and 90, the cost is US$ 5 if the connection takes between 30 and 90 minutes.
Here, the true statement about the Internet connection cost is D. Any amount of time over an hour and a half would cost $10.
Learn more about cost on:
brainly.com/question/13862342
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I attached a pic with my work on it. Hope this helps!