Can someone please help me with these two questions, because I really don't understand them.

Mathematics

1 answer:

polet [3.4K]4 years ago

7 0

~Hello There!~

19. You can use Pythagoras to figure out the missing length of the triangle
√15² - 9² = 12
(12 x 9)/2 = 54
((20 + 32) / 2) x 9 = 234
234 + 54 = 288

That's what i got ^^ Not 100% sure if its correct

20. 8 + 3 + 6 + 3 = 20
20/4 = 5
Mean = 5

Hope This Helps You!
Good Luck :)
Have A Great Day ^_^

- Hannah ❤

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16 times

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$\textsf{Volume of a cone}=\sf \dfrac{1}{3} \pi r^2 h \quad\textsf{(where r is the radius and h is the height)}$

If only the radius is changed, the change in volume will be proportionate to the multiplicative factor squared.

$\sf \implies Volume =\dfrac{1}{3} \pi (ar)^2h=\dfrac{1}{3} \pi (a^2)r^2h$

Therefore, if the cone is quadrupled (multiplied by 4), the volume of the larger cone will be 4² times greater than the volume of the smaller cone, so <u>16 times greater </u>than the smaller cone.

<h3><u>Proof</u></h3>

Given: