3 years ago

If there is 20 ducks and 4 of them walk away how many ducks are here

Mathematics

1 answer:

Anastaziya [24]3 years ago

3 0

Answer:

20 - 4 = 16

~CoCo❤

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What is the radius of a hemisphere with a volume of 6466 to the nearest tenth of a meter?

Alecsey [184]

Answer:

14.6m

Step-by-step explanation:

volume of a hemisphere = (2/3)πr3

Therefore r = Cube root of ( Volume * 3/2 * 1/ pi)

r = cube root ( 6466 * 3/2 * 1/ π)

r = 14.56

in the nearest tenth of a meter = 14.6 m

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3 years ago

Need help! Law of cosines...find b round to the nearest tenth please

dusya [7]

ANSWER

$B = 27.8 \degree$

EXPLANATION

The law of cosine is given by the formula:

${b}^{2} = {a}^{2} + {c}^{2} - 2bc \cos(B)$

From the diagram,

a=17, b=8, c=16

We substitute the given values into the formula to obtain:

${8}^{2} = {17}^{2} + {16}^{2} - 2(17)(16)\cos(B)$

$64 = 289+ 256- 544\cos(B)$

$64 = 545- 544\cos(B)$

$64 - 545 = - 544\cos(B)$

$- 481 = - 544\cos(B)$

$\frac{ - 481}{ - 544} = \cos(B)$

$cos(B) = 0.88419$

$B = \cos ^{ - 1} (0.88419)$

$B = 27.8 \degree$

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3 years ago

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Cement pillars for a porch or 2 feet wide, 2 feet thick, and 8 feet tall, there are six pillars in all what is the total volume

PolarNik [594]

(8)(2)(2)=32
32(6)=192
Final answer: 192ft^3

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3 years ago

Use the data set below to answer questions 7 to 9

Mariana [72]

Range: 16 (20 - 4)

Median: 9 (average 8 and 10)

Mean: 9.5 (average all the numbers)

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