A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
help plz
anonymous
 one year ago
help plz

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The coordinates A(0, 0), B(0, 5) and C(3, 0) are graphed and connected together. What 3dimensional shape will be created when this shape is rotated about the yaxis? Provide an explanation and proof for your answer to receive full credit.

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1A great tool for graphing this would be Desmos, if you haven't already used it. It should be able to help you visualize what the preimage of the shape (before rotation) will look like. https://www.desmos.com/calculator

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1It looks like the shape's preimage will be a triangle with the right angle at the origin. What would happen if you rotated this shape 360 degrees?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i have 2 more question if you dont mind

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1I'll answer them the best I can.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Which of these countries has the greatest population density? Which has the least? Provide an explanation and proof for your answer to receive full credit.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Country Population (1997 estimate) Area (square km) U.S. 272,648,000 9,364,520 Romania 22,609,000 237,391 Ghana 18,339,000 237,533

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1I guess I'm just not really sure what that question is trying to ask.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Country Population Area square km) U.S. 272,648,000 9,364,520 Romania 22,609,000 237,391 Ghana 18,339,000 237,533

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is that a better chart

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Which of these countries has the greatest population density? Which has the least? Provide an explanation and proof for your answer to receive full credit

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1I'm assuming it's asking you to find the number of people per square kilometer. I'm not ENTIRELY sure what to do here, but I'm assuming you could simply divide the population by the number of square kilometers (the area) to get that information.

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1For example, the US would be 272,648,000 / 9,364,520 = 29.115.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Pyramid A is a square pyramid with a base side length of 14 inches and a height of 6 inches. Pyramid B has a volume of 3,136 cubic inches. How many times bigger is the volume of pyramid B than pyramid A? Give your answer as a percent. Provide an explanation and proof for your answer to receive full credit.

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1Do you know how to calculate the volume of a square pyramid?

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1The formula is \[\frac{ 1 }{ 3 } b ^{2} h\] or \[b ^{2} \frac{ h }{ 3 }\] Knowing this, what would you get for the volume of the first square pyramid?

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1That's b squared, not b cubed.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok hold up let me add it again

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1I think you're getting caught up somewhere in the calculation. Let's take this step by step.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.014*14=196 6/3=2 196/2=98

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1\[b ^{2} \frac{ h }{ 3 }\] \[14^{2} \frac{ 6 }{ 3 }\] \[196(\frac{ 6 }{ 3 }) = ? ^{3}\]

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1Ah, you're making the mistake of dividing 14 squared by six thirds instead of multiplying them.

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1Good! :) Now, to calculate percent change, you would start by finding the difference between the two volumes (or the increase). The formula to find the increase is... \[Increase = New  Old\]

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1In this case, it would be Pyramid B  Pyramid A.

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1Er, I apologize. The other way around, I believe.

nerdyotter
 one year ago
Best ResponseYou've already chosen the best response.1Then, the formula to find percent change is \[change = (\frac{ increase }{ original })(100)\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.02744 2744/3136 (100)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.087.5% is that correct

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@nerdyotter is this correct
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.