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Liono4ka [1.6K]
3 years ago
8

If r=4cm and h= 4cm, what is the volume of the cone

Mathematics
1 answer:
pav-90 [236]3 years ago
8 0

Answer:

volume cone = 1/3 pi r^2 h

volume cylinder = pi r^2 h

Step-by-step explanation:

1.  Volume = 1/3 x pi x r^2 x h = 12 X pi

2.  100 pi = 1/3 x pi x r^2 x 12

r^2 = 25

r = 5 cm

3.  volume = pi x 16 X 5 = 80 pi cubic meters

4.  400 pi = pi x r^2 X 4

r^2 = 100

r = 10 yards

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3 years ago
Solve the equation a + b - c = 180 for a. *​
spin [16.1K]

Answer:

a = 180 - b + c

Step-by-step explanation:

a + b - c = 180

Move b by subtracting b from both sides.

a - c = 180 - b

Move c by adding c to both sides.

a = 180 - b + c

Therefore a equals 180 - b + c.

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If f(x)= x^3-2x+6, find f(-2)
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--8+4+6=2 Hope it helps :-)
5 0
3 years ago
Alice earned $622.50 in interest on her savings in the bank. Before interest, the account had $12,450. What is the approximate p
Lubov Fominskaja [6]

<u><em>Answer:</em></u>

5%


<u><em>Explanation:</em></u>

% she earned in interest can be calculated by calculating the % of increase in the balance


<u>We have:</u>

Original balance = $12,450

Amount of interest = $622.5

<u>This means that:</u>

new balance = 12,450 + 622.5 = $13,072.5


<u>Now, we can get the percentage of increase:</u>

% of increase = \frac{Value_n_e_w - Value_o_l_d}{Value_o_l_d} *100


<u>Substitute with the values we have to get the percentage of interest earned as follows:</u>

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Hope this helps :)

7 0
3 years ago
Read 2 more answers
Simplify 70 +(-30)+2+(-9)+0.3+(-0.1)=[70+(-30)] +[2+(-9)]+[0.3+(-0.1)]
natka813 [3]

Answer:

Step-by-step explanation:

When you add the left side of the equation, you get 33.2 because 70-30 is 40, 40+2 is 42, 42-9 is 33, 33+0.3 is 33.03, 33.3-0.1 is 33.2.

When you add the right side of the equation, you get 33.2, because they are the same problem but on side has brackets.

Hope this helps you.

4 0
3 years ago
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