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3 years ago

I need help really badly with this

Mathematics

1 answer:

Scorpion4ik [409]3 years ago

6 0

Shortcut: you notice that the curve passes through (1,0)

Only log function passes this point.

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Harry's spell casting class lasts 5/6 of an hour each day. Today, he has been in the class for 2/5 of an hour so far. How much m

Anna007 [38]

30 minutes are left in the class.

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3 years ago

I don’t understand what #5 is asking me to do! Ty

Aleksandr-060686 [28]

You have to explain how you knew to use 55 and 120, not another option.

Hope it helped! :)

4 0

3 years ago

50 males liked the veggie burger and 40 males liked the pizza so out of 90 males what percent liked the burgers?

sergij07 [2.7K]

Answer: 10%?????????????????????

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

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

What is the simplest form for 30/42? thanks!?

andre [41]

It would be: 30/42 = 15/21 = 5/7

In short, Your Answer would be 5/7

Hope this helps!

7 0

3 years ago

Read 2 more answers