Question

Pyramid 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 3136 cubic inches. How many times bigger is the volume of pyramid B than pyramid A?

Answer 1

Which of these countries has the greatest population density? Which has the least? How can you tell?

Answer 2

@RaphaelFilgueiras

Answer 3

@lolly

Answer 4

For the first question that you posted
use the formula for volume of square pyramid
\(v=b^2 \frac{h}{3}\)
to calculate the volume of pyramid A.
then compare it to the volume of pyramid B.

For the next one:
\(population\ density= \frac{population}{area}\)
then compare the population density of the three countries

Answer 5

for the volume
v=volume
b=base
h=height

Answer 6

b-14 h-6
Pyramid B has a volume of 3136 cubic inches.

Answer 7

using the formula, pyramid A will have a volume of:?

Answer 8

could you help me i really don't understand

Answer 9

@hlee13

Answer 10

solving for the volume of pyramid A:
b=14 h=6
\(v=b^2 \frac{h}{3}\\v=(14)^2 (\frac{6}{3})\\v=?\)

Answer 11

392

Answer 12

@Chibi_Robo3

Answer 13

the question asks "how many time b is bigger than a"
so get the ratio of both volumes b:a
3136 / 392= ?

Answer 14

so the volume of pyramid B will be 8 x bigger than pyramid A

Answer 15

Ok can ya help me with 2
@Chibi_Robo3

Answer 16

use the formula that i gave you above for the second one
do it for each countries and tell me what you got
this one is pretty straightforward, so i believe you can do it :)

Answer 17

U.S--29.11500002135721

Answer 18

Denmark--0.1247237207975854
Ghana--0.0772061145188248

Answer 19

@Chibi_Robo3

Answer 20

US is right, but for the two countries, i think you solved it in a wrong way

Answer 21

try it again

Answer 22

could you help me i did them the same way i did US

Answer 23

populatin/area?

Answer 24

i think you did the other way, instead of "population/area", you used "area/population"

Answer 25

oh ok let me redo them

Answer 26

Denmark--8.017721036585366
Ghana--12.95234200338077

Answer 27

@Chibi_Robo3

Answer 28

us: 29.11
denmark : 124.72
ghana: 77.21

from these values, can you answer the questions now?

Answer 29

Denmark is the density then Ghana the us is the least density

Answer 30

right ;p