How long is one side?

Mathematics

1 answer:

ki77a [65]3 years ago

6 0

Answer:

3 in

Step-by-step explanation:

A cubes sides are all the same length. The volume is 27. We take the cube root of the volume to find one length. the cube root of 27 is 3 so one side length is 3.

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Prove that sin20sin40sin60sin80=3/16

never [62]

We'll use the following properties of sine and cosine to prove this:

$sin(a)\cdot sin(b) = \frac12(cos(a-b) - cos(a+b))$

$cos(a)\cdot cos(b) = \frac12(cos(a+b) + cos(a-b))$

$cos(180+a) = cos(180-a)$

Then it's just a matter of filling it in...

sin20sin40 * sin60sin80 = 1/2(cos20 - cos60) * 1/2 (cos20 - cos140) =

1/8( cos40 + 1 - cos160 - cos120 - cos40 - cos80 + cos80 + cos200) =

1/8(1 - cos160 - cos120 + cos200) =

1/8(1 - cos160 - cos120 + cos160) =

1/8(1 - cos120 ) = 1/8( 1 + 1/2 ) = 3/16

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3 years ago

What is the product of 1 and 1 3rd and 7/10

Dmitrij [34]

The correct answer is 14/15. To answer this problem, it would help to change the mixed number into an improper fraction.

1 1/3
4/3 Multiply 3 by 1, and then add 1 and put 4 over 3.

4/3 x 7/10 Now, multiply both numbers by each other. Since we're multiplying, we don't need to find a least common denominator.
28/30 4 x 7 = 28; 3 x 10 = 30
14/15 Since 28 and 30 are divisible by 2, we need to simplify the answer.

The correct answer is 14/15.

Hope this helps!

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3 years ago

SCORPION-xisa [38]

Answer:

i know ima lil late but heres the answer

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

On this map, Oxford street is perpendicular to blank , and Rosewood Street is perpendicular to blank, assume that the street int

spayn [35]

left angle because it turns to oxford

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3 years ago

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Elanso [62]

Answer:

the correct answer would be C. the tens place

Step-by-step explanation:

104.372 the 4= ones place and then the 0= tens place but if you go the other way where the .372 is it would be 3=tenths 7=hundredths

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3 years ago