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4 years ago

I got 2136cm2 but my answer key says different... please help and show all work

Mathematics

2 answers:

patriot [66]4 years ago

7 0

Answer:

Step-by-step explanation:

<h2>surface area = 2πr²+2πrh</h2><h2>2×22÷7×10²+2×22÷7×10×24</h2><h2>=2137.14</h2>

Lena [83]4 years ago

6 0

It all depends what value they use for pi 3.14 or 22/7 or just pi on the calculator.

I used 3.14 and got 2.135.2

2(3.24)(10)^2+2(3.14)(10)(24)

Step-by-step explanation:

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WILL GIVE BRAINLIEST!

nasty-shy [4]

36x^2+72x+36 I think

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3 years ago

Which of the following is the equation for the line of symmetry in this figure?

pochemuha

Answer:

y = -2

Step-by-step explanation:

This one is easy. As you may know, a axis of symmetry is the line where everything is the same on both sides of it. For this, you can use trial and error or just look at the points on either side. For y = -1, that will put the line in an awkward spot, crossing through 2 slanted lines instead of corners. For x = -1, this just cuts through the shape straight up and down and does not make the shape look equal on both sides of the line at all. Same goes for x = -2. I should probably mention, when you see a line that is described as "x = 1", it is a vertical line, because the line is constantly staying on the point x = 1, while having an infinite number of y-values. When you see "y = 1", it will be horizontal for the same reason, just flipped.

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3 years ago

If you are examining a function over an interval ( a , b ) , for a and b finite, is it possible not to have an absolute maximum

uysha [10]

Yes, it is not possible to have an absolute maximum or absolute minimum.

Here,

We are examining a function over an interval ( a , b ) , for a and b finite,

We have to find, is it possible not to have an absolute maximum or absolute minimum.

What theorem indicates the existence of absolute maxima or absolute minima of a function?

If f is continuous on a closed interval [a, b] (that is: on a closed and bounded interval), then, the Extreme Value Theorem indicates the existence of an absolute maximum or minimum value of f on the interval [a, b].

Now,

The function is define over an interval (a, b).

Hence, the function is define on open interval.

So, it is not possible to have an absolute maximum or absolute minimum.

Learn more about the existence of maxima and minima visit:

brainly.com/question/6787214

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3 0

2 years ago

Help me find the answer to this piecewise problem!! 20 Points !!!!

MrRissso [65]

Answer:

So we have x+3 if -3<=x<=-1

and 5 if -1<=x<=1

Step-by-step explanation:

The one piece from -1 to 1 is horizontal so the line is in the form of y=a number. It goes through 5 on the y-axis so the equation there is y=5.

From -3 to -1, that is a line with positive slope (since that part is increasing).

Slope=rise/run

We see from the filled in dot to the unfilled in dot that the rise is 2 and the run is 2 so the slope is 2/2=1.

So if we did extend this line where we go at on the y-axis? It would go through 3 because starting from the unfilled dot and rising 1 and running 1 will get us to the 3 on the y-axis.

The equation of a line in slope-intercept form is y=mx+b.

We have m=1 and b=3 so the equation is y=1x+3 or just y=x+3.

So we have x+3 if -3<=x<=-1

and 5 if -1<=x<=1

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3 years ago

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Illusion [34]

Answer:

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Step-by-step explanation:

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3 years ago