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aniked [119]
2 years ago
13

PLEASE HELP!!

Mathematics
2 answers:
QveST [7]2 years ago
8 0

Answer is D and E

Step-by-step explanation:

Option D u will multiply each side by the LCM which is 3 and u will get the answer to be C=9

option E u will divide both side by 4 and u will get the answer to be C=9

Yuri [45]2 years ago
4 0

Answer: d and e

Step-by-step explanation:

a) 4 - 9 = 5 FALSE

b) 20 = 14 + 9 FALSE

c) 15 = 9 - 6 FALSE

d) 9 divided by 3 = 3 TRUE

e) 36 = 4 x 9 TRUE

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krek1111 [17]

Answer:

BA = 25π,

LA = 25√2π,

TA = 25π + 25√2π,

V = 41 and 2 / 3π

Step-by-step explanation:

We need to determine the height here, as it is not given, and is quite important to us. The height is a perpendicular line segment to the radius, hence forming a 45 - 45 - 90 degree triangle as you can see. Therefore, by " Converse to Base Angles Theorem " the height should be equal in length to the radius,

( Height = 5 inches = Radius

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Now knowing the height, let's begin by calculating the base area. By it's name, we have to find the area of the base. As it is a circle, let us apply the formula " πr^2 "

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The lateral area is simply the surface area excluding the base area, the surface area having a formula of " πr^2 + πrl. " Thus, the lateral area can be calculated through the formula " πrl, " but as we are not given the slant height ( l ) we have to use another formula, l= \sqrt{r^2+h^2} -

\pi r( \sqrt{r^2+h^2} )\\= \pi( 5 )( \sqrt{5^2 + 5^2} )\\= 25\sqrt{2} \pi- Lateral Area = 25√2π

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And the surface area is the base area + lateral area -

25\pi + 25\sqrt{2} \pi - Surface Area

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The volume of a cone is 1 / 3rd that of a cylinder, with a simple formula of Base * height. Therefore, we can conclude the following -

1 / 3( 25\pi )( 5 )\\= 25 / 3( 5 )( \pi )\\= 41 \frac{2}{3}\pi- Volume = 41 and 2 / 3π

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