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Lostsunrise [7]
3 years ago
13

Please help

Mathematics
1 answer:
stiks02 [169]3 years ago
3 0

Answer:

270 cubic inches

Step-by-step explanation:

first you multiply 9 times 5 which equals 45 and then you multiply 45 by 6 to get 270. (for volume its length times width times height)

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Nathan bought a pair of boots for $79.95 and 2 shirts for $19.99 each. The sales tax is 7.5%. How much did Nathan pay for all th
Sophie [7]
First, add up his total.
79.95+2*19.99=<span>119.93
Then multiply by 1.075 (this will add the tax to the amount)
That gives us </span><span>128.92475, which we can simplify to 128.92
He had to pay $128.92
</span>
8 0
3 years ago
A true-false quiz with 10 questions was given to a statistics class. Following is the probability distribution for the score of
disa [49]

Answer:

E(X)=\sum_{i=1}^n X_i P(X_i)  

And if we use the values obtained we got:  

E(X)=5*0.05 +6*0.15 +7*0.33 +8*0.28+ 9*0.12 +10*0.07=7.48  

For this case this value means that the expected score is about 7.48

Step-by-step explanation:

For this case we assume the following probability distribution:

X         5       6         7       8        9        10

P(X)   0.05   0.15  0.33  0.28   0.12   0.07

First we need to find the expected value (first moment) and the second moment in order to find the variance and then the standard deviation.

In order to calculate the expected value we can use the following formula:  

E(X)=\sum_{i=1}^n X_i P(X_i)  

And if we use the values obtained we got:  

E(X)=5*0.05 +6*0.15 +7*0.33 +8*0.28+ 9*0.12 +10*0.07=7.48  

For this case this value means that the expected score is about 7.48

In order to find the standard deviation we need to find first the second moment, given by :  

E(X^2)=\sum_{i=1}^n X^2_i P(X_i)  

And using the formula we got:  

E(X^2)=(5^2 *0.05)+(6^2 *0.15)+(7^2 *0.33)+(8^2 *0.28)+ (9^2 *0.12 +(10^2 *0.07))=57.46  

Then we can find the variance with the following formula:  

Var(X)=E(X^2)-[E(X)]^2 =57.46-(7.48)^2 =1.5096  

And then the standard deviation would be given by:  

Sd(X)=\sqrt{Var(X)}=\sqrt{1.5096}=1.229  

5 0
3 years ago
Read 2 more answers
the frequency table shows the number of books some students read last summer. Based on the data in the table, which statement is
Whitepunk [10]

Answer:

  A.) nine more girls read 6 or more than boys who read 6 or more books

Step-by-step explanation:

Let's examine the statements ...

  a) 24 is 9 more than 15 . . .  TRUE

  b) 41 is 6 more than 36 . . . false

  c) 32 is twice as many as 15 . . . false

  d) 24 is twice as many as 48 . . . false

3 0
3 years ago
Asaph took out a loan for $17,550. To pay it back, he will make 60 monthly payments of $437.
alexira [117]
Total payments 437×60=26,220
Interest paid
26,220−17,550=8,670
7 0
3 years ago
Read 2 more answers
M
Olegator [25]

Answer:

the answer is B

Step-by-step explanation:

4 0
3 years ago
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