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4 years ago

Chandra bought a 2-liter bottle of

Mathematics

1 answer:

tatuchka [14]4 years ago

3 0

Answer:B

Step-by-step explanation:

Divide by 8 and look at the whole number

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Find each percent increase round to the nearest percent from $5 to $8

IRISSAK [1]

There are at least a few ways to do it, one of them being:

$8 - $5 = $3, so we may want to find out how much percent of 5 is 3.

3 = x% of 5
3 = x/100 * 5
3 = x/20 * 1
3 = x/20 / * 20 (both sides)
x = 60 [percent]

So now we know that 3 is 60% of 5. It also means that the increase from $5 to $8 was by 60%.

6 0

4 years ago

What’s the median for 28,30,30,30,30,31,31,31,31,31,31,31,31

olya-2409 [2.1K]

Answer:

Step-by-step explanation:

The median is the number that we find in the middle of the data.

So if we have a sequence of {1,2,3}

Then 2 is the median

If we have a sequence of {1,2,3,4,5}

Then 3 is the median

We look in the middle of 28,30,30,30,30,31,31,31,31,31,31,31,31

and we find 31 in the middle.

Note:

If the middle is something with 2 terms in the middle like

1,2,3,4

Then the median is the average of the two middle terms which is

(2+3)/2 = 2.5

7 0

2 years ago

Write these numbers in standard form.

Wewaii [24]

Answer:

A ) -5

B) -4

C) -9

D) -12

3 0

3 years ago

What is the missing length?

Lostsunrise [7]

Answer:

DONT CLICK THE LINK ITS A VIRUS

Step-by-step explanation:

7 0

3 years ago

Prove the identity: cos(3t)=cos^3(t)-3sin^2(t)cos(t)

Pepsi [2]

Solutions

To solve the given equation lets use double-angle theorem. Double-angle formulas allow the expression of trigonometric functions of angles equal to 2α in terms of α, which can simplify the functions and make it easier to perform more complex calculations, such as integration, on them.

cos(3t)=cos^3(t)-3sin^2(t)cos(t)

cos(A+B) = cosAcosB - sinAsinB

Now cos(3t) = cos(2t+t) 

⇒cos(2t)cos(t) - sin(2t)sin(t) 

⇒(2cos^2(t)-1)cos(t) - 2sin(t)cos(t)sin(t) 

⇒ 2cos^(3)t - cos(t) - 2sin^2(t)cos(t) 

⇒ 2cos^3(t) - cos(t) - 2(1-cos^2(t))cos(t) 

⇒2cos^3(t) - cos(t) - 2cos(t) + 2cos^3(t) 

⇒4cos^3(t) - 3cos(t)

3 0

3 years ago