Surface area of a sphere

Mathematics

1 answer:

notsponge [240]3 years ago

5 0

Answer:

50.27

Step-by-step explanation:

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about 70,000 people live in a circular region with a 30-mile radius. find the population density in people per square mile.

bezimeni [28]

Solve for the area of the circular region first:

A = pi*r^2

A = pi*(30 mi)^2

A = 2827.43 mi^2

Density = 70000 people/2827.43 mi^2

Density = 24.76 = 25 people/mi^2 <--ANSWER Plz vote brainnliest

4 0

3 years ago

I had trouble understanding algebra and now I am in geometry so If you can help me understand both that will be good. I have thi

diamong [38]

Start by completely ignoring the paralelagram.

Let's choose the top triangle as our starter.

To get the top triangle to the position of the bottom triangle, you must translate it.

First, find how many units the first triangle must move down to reach the same level as the bottom triangle, (i'll let you figure it out bu numbering this as a question) 1.

Next, your first triangle should need to move left to reach the position of the second triangle. How many units left does the first triangle need to move?

2.

You moved the first triangle *Blank* units down and *Blank* units left.

Lastly, you need to look at your paralelagram.

Take the same movements you did with the two triangles and transfer them to the nessacary point of the paralelagram.

If you need and extra help, or need more explanation, ask in the comments section. I also recomend that you tell me what you got as your answers to one and two so that you can make sure you got the answer correct.

3 0

3 years ago

Find the perimeter pf a rectangular parking lot that has a width of 3x+2 and a length of 5x-7.*

uranmaximum [27]

Answer:

Perimeter is 16x - 10

Step-by-step explanation:

${ \sf{perimeter = 2(length + width)}} \\ p = 2 \{(5x - 7) + (3x + 2) \} \\ p = 2(8x - 5) \\ p = 16x - 10$