4. One printing machine printed 1920 books in 40 hours this week. A
second printing machine printed for 30 hours this week but printed books
at twice the hourly rate of the first machine. How many books did the
second machine print this week?

Answer:

The sampling distribution of the time spent studying has an approximately normal distribution, with mean 2.2 and standard deviation 0.1414.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Each student:

Mean of 2.2 hours, standard deviation of 2 hours.

Sampling distribution of the time spent studying has approximate distribution

Sample of 200.

By the Central Limit Theorem,

Approximately normal

Mean 2.2

Standard deviation [tex]s = \frac{2}{\sqrt{200}} = 0.1414[/tex]

The sampling distribution of the time spent studying has an approximately normal distribution, with mean 2.2 and standard deviation 0.1414.

Answer:

3/8 so it is less than 1

Step-by-step explanation:

Answer:

No

Step-by-step explanation:

Use 2/5...

2 times 2 is 4

5 is greater than four

but 4/5 and 2/5 cannot be replaced with 0

Hence this claim is busted

i hope this helps!

Answer:

hi

Step-by-step explanation:

Find an answer to your question The volume of the box is 448 ft'. Find its length and width. 4 ft X-6 X The box has a length of ft and a width of ft.

hope this helps

Answer:

i think C

im not really sure

Answer:

the probability of drawing a blue ball from bag A is 1/5 and the probability of drawing a red ball from bag B is 2/3.

The probability of drawing a blue ball from Bag A and a red ball from Bag B will be 2/15.

Probability denotes the likelihood of something happening. It is concerned with the occurrence of an unpredicted event.

Probability can only have a value between 0 and 1. Its simple notion is that something will most likely occur. The favorable event's proportion to the overall number of events is known as the favorable event ratio.

The probability of drawing a blue ball from Bag A is, 1/5

The probability of drawing a red ball from Bag B is, 2/3.

P(A)=1/5

P(B)=2/3

The probability of drawing a blue ball from Bag A and a red ball from Bag B will be;

P(A and B)=P(A). P(B)

P(A and B)=(1/5)×(2/3)

P(A and B)=(2/15)

Hence,the probability of drawing a blue ball from Bag A and a red ball from Bag B will be 2/15.

To learn more about the probability refer;

https://brainly.com/question/795909

#SPJ2

Answer:

A

Step-by-step explanation:

8 pink : 7 orange

Answer:

Straight

Step-by-step explanation:

If the angle is flat or 180 degrees, it is straight

If the angle is like an L or 90 degrees, it is right

If the angle is less than 90 degrees, it is acute

If the angle is more than 90 degrees, it is obtuse

Hope this helps!!

Answer:

IT is a straight angle because it is 180 degrees

Step-by-step explanation:

Step-by-step explanation:

Goal

Given

6c²-5d+8

c = 5 and d = 4

Step 1

6(5)²-5(4)+8

6(25)-20+8

Step 2

150-20+8

150-12

138

Hence, the solution is 138.

Answer:

138 is answer please give brainliest

Answer:

13m²

Step-by-step explanation:

Area=6.5*4÷2=13

Answer:

13m

Step-by-step explanation:

1/2 × bas × perpendicular height

Answer:

B

Step-by-step explanation:

Hope the picture helps!

Answer:

E- don't report this one-

Step-by-step explanation:

Answer:28

Step-by-step explanation:

hope this helpes

Answer:

The cube root of 27 is 3

Answer:

man i get that- but just try and keep your head up!! you got this!!

Step-by-step explanation:

have cute picture of a cat!!

Things are only hard if you make them, so simply tackle it like the hulk in avengers: age of Ultron! Besides, with as bright of a head as you have on your shoulders, it should be a piece of cake! Also while doing the project, try listening to music. That way, it makes the time pass by and before you know it, your in the teachers room with that A+ project. Anyway, I wish you the best of luck and hope you have a wonderful day! :)

Answer:

The graph which represents the function g(x) = 21·x² + 37·x + 12, is described as follows;

Because 'c' is positive, the constant terms in each factor must have the same signs

Because the function has a positive value for 'b', the constant terms in each factor will both be positive which results in negative  roots and the graph of the function, g(x) = 21·x² + 37·x + 12, has two negative x-intercepts

The graph which represents the function h(x) = 21·x² - 37·x + 12, we have is described as follows;

Because 'c' is positive, the constant terms in each factor must have the same signs

Because the function has a negative value for 'b', the constant terms in each factor will both be negative which results in positive roots and the graph of the function, g(x) = 21·x² + 37·x + 12, has two positive x-intercepts

Step-by-step explanation:

The given functions are;

g(x) = 21·x² + 37·x + 12

h(x) = 21·x² - 37·x + 12

For the graph which represents the function g(x) = 21·x² + 37·x + 12, we have

Because 'c' is positive, the constant terms in each factor must have the same signs

Because the function has a positive value for 'b', the constant terms in each factor will both be positive which results in negative  roots and the graph of the function, g(x) = 21·x² + 37·x + 12, has two negative x-intercepts

For the graph which represents the function h(x) = 21·x² - 37·x + 12, we have

Because 'c' is positive, the constant terms in each factor must have the same signs

Because the function has a negative value for 'b', the constant terms in each factor will both be negative which results in positive roots and the graph of the function, g(x) = 21·x² + 37·x + 12, has two positive x-intercepts

Answer:

It will take 4 minutes for the balloon to reach an altitude of 57 yards.

Step-by-step explanation:

Initial altitude:

100 1/5 yards = 100 + 0.2 = 100.2 yards.

Decrease per minute:

10 4/5 yards = 10 + 0.8 = 10.8 yards.

So, after t minutes, the height of the ballon is given by:

[tex]h(t) = 100.2 - 10.8t[/tex]

Number of minutes it will take the balloon to reach an altitude of 57 yards.

This is t for which [tex]h(t) = 57[/tex]. So

[tex]h(t) = 100.2 - 10.8t[/tex]

[tex]57 = 100.2 - 10.8t[/tex]

[tex]10.8t = 43.2[/tex]

[tex]t = \frac{43.2}{10.8}[/tex]

[tex]t = 4[/tex]

It will take 4 minutes for the balloon to reach an altitude of 57 yards.

Answer:

7y=11x-2y=2

7y-2y=2-12x

5y=9x

y=9x÷5

y=45ans

Step-by-step explanation:

have a nice day!

Answer:

1 so y=1+b

Step-by-step explanation:

9514 1404 393

Answer:

Step-by-step explanation:

The slope is the ratio of "rise" to "run". The "rise" is the vertical distance between two points; the "run" is the corresponding horizontal distance.

Here, we see point A is (0, 3) and point B is (1, 2). Then the "rise" is 2 -3 = -1, while the "run" is 1 - 0 = 1. The slope is the ratio ...

  m = rise/run = -1/1 = -1

The slope of the line is -1.

__

The point A is the y-intercept, where the line crosses the y-axis. It tells us the value of y is 3 when x=0. So, we can write the equation in slope-intercept form as ...

  y = mx + b . . . . . where m is the slope (-1) and b is the y-intercept (+3)

  y = -x +3

Answer:

x can be 3 or (-4) because

area of a rectangle= length × breadth

12=x×(x+1)

12=x^2+x

x^2+x-12=0

x^2 +4x-3x-12=0

x(x+4)- 3(x+4)=0

(x+4)(x-3)=0

(x+4)=0 or (x-3)=0

Therefore, x=(-4) or 3

Since, the dimensions of a rectangle cannot be negative, x=3.

Therefore, the width of a rectangle(x)=3 cm,

the length of a rectangle(x+1)=(3+1)=4 cm

Pls mark me as the brainliest.

Answer:

864 square inches

Step-by-step explanation:

Surface Area = 12 x 12 x 6

Surface Area = 144 x 6 = 864

Hope that helps!

Answer:

864

Step-by-step explanation:

12*12 =144 (the surface of one side

144*6 =864 (the surface of all sides)

Answer:

zhdhsgscsisgege8djdhshsyw7273yeh3737eyd

Answer:

5/8.

Hope this helped.

Answer:

one point will be on (3,2) another on (5,3) and 1 more on (6,6)

Step-by-step explanation: not sure if this is 100% correct or not