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2 years ago

If I drop a book from the same height as a feather which will land first?

Mathematics

2 answers:

g100num [7]2 years ago

4 0

The book will land first

liberstina [14]2 years ago

4 0

The book will drop first because it is heavier, but the feather is lighter.

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Eliott is 63 inches tall, which is 9 inches taller than his cousin,Jackson. Write and solve an addition equation to find Jackson

olasank [31]

To find Jackson's height, you subtract 9 from 63 which gives you 54. 63-9=54

8 0

3 years ago

How many grams are there in 4.5 kilograms

zavuch27 [327]

Answer: 4500 grams

Step-by-step explanation: 1 kilogram is 1,000 grams, so 4 kilograms is 4,000 grams, and half a kilogram is 500 grams. So, 4000 + 500 = 4,500

3 0

3 years ago

Read 2 more answers

Is this right?? please help!

Ganezh [65]

Answer:

6 < x < 8

Step-by-step explanation:

The compound inequality in this instance represent the "and" condition, not the "or" condition.* We might solve it like this.

-47 > 1 -8x > -63 . . . . given

Multiply by -1:

47 < -1 +8x < 63

Add 1:

48 < 8x < 64

Divide by 8:

6 < x < 8

______

* You can tell this is the case by looking at the ends of the given statement:

-47 > -63 . . . . a true statement, so the solution set will be an intersection, not a union.

4 0

3 years ago

Plz help me i cant figure it out

Lelechka [254]

Answer:

35 degrees

Step-by-step explanation:

triangle is always a total of 180 degrees

5 0

3 years ago

g If the economy improves, a certain stock stock will have a return of 23.4 percent. If the economy declines, the stock will hav

dusya [7]

Answer:

$E(X) = 23.4* 0.67 -11.9*0.33= 11.759 \%$

Now we can find the second central moment with this formula:

$E(X^2) = \sum_{i=1}^n X^2_i P(X_i)$

And replacing we got:

$E(X^2) = (23.4)^2* 0.67 +(-11.9)^2*0.33= 413.5965$

And the variance is given by:

$Var(X) = E(X^2) - [E(X)]^2$

And replacing we got:

$Var(X) = 413.5965 -(11.759)^2 =275.5105$

And finally the deviation would be:

$Sd(X) = \sqrt{275.5105}= 16.599 \%$

Step-by-step explanation:

We can define the random variable of interest X as the return from a stock and we know the following conditions:

$X_1 = 23.4 , P(X_1) =0.67$ represent the result if the economy improves

$X_2 = -11.9 , P(X_1) =0.33$ represent the result if we have a recession

We want to find the standard deviation for the returns on the stock. We need to begin finding the mean with this formula:

$E(X) = \sum_{i=1}^n X_i P(X_i)$

And replacing the data given we got:

$E(X) = 23.4* 0.67 -11.9*0.33= 11.759 \%$

Now we can find the second central moment with this formula:

$E(X^2) = \sum_{i=1}^n X^2_i P(X_i)$

And replacing we got:

$E(X^2) = (23.4)^2* 0.67 +(-11.9)^2*0.33= 413.5965$

And the variance is given by:

$Var(X) = E(X^2) - [E(X)]^2$

And replacing we got:

$Var(X) = 413.5965 -(11.759)^2 =275.5105$

And finally the deviation would be:

$Sd(X) = \sqrt{275.5105}= 16.599 \%$

7 0

2 years ago