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soldier1979 [14.2K]
3 years ago
5

What is margin of error??

Mathematics
1 answer:
Tems11 [23]3 years ago
8 0

Answer:

The margin of error for a sample size of 250 is 6

Step-by-step explanation:

The margin of error is given as

1/square root of the sample size

Thus, margin of error for a sapless size of 250 is

1/√250

= 1/15. 811

= 6

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Forty tickets at $10.50 each cost?
ANEK [815]

Answer:

This question isn't worded properly but I'll try my best to answer it. What I think you're trying to ask is "How much money would 40 tickets cost?"

Step-by-step explanation:

Well,  to make the multipulcation easier you would take away the zero just for now. It should look like this: 4x$10.50=42

Your answer is $42, but then you add the zero back on to that. So now the answer is $420.

<h2>$420 is your final answer</h2>

<em><u>Thanks, I hope this helped! If it did I wouldn't mind being mark brainlist!</u></em>

7 0
3 years ago
Keiko the trainer has two solo workout plans that she offers her clients: Plan A and Plan B. Each client does either one or the
soldier1979 [14.2K]

Hey!

Hope this helps....

~~~~~~~~~~~~~~~~~~~~~~~~~

Given Information:

No client can do both Plans

On Wednesday: 3 clients did Plan A, and 2 clients did Plan B

On Thursday: 5 clients did Plan A, and 6 clients did Plan B

Keiko was training for a total of 6 hours on Wednesday, and training for a total of 12 hours on Thursday

------------------------------

We'll let t stand for length of time


Wednesday:

3t + 2t = 6

5t = 6

t = 1.2 hours > translates to 1 hour, and 12 minutes

On Wednesday, she was with her clients individually for 1 hour and 12 minutes


Thursday:

5t + 6t = 12

11t = 12

t ~ 1.1 hours > translates to about 1 hour and 6 minutes

On Thursday, she was with her clients individually for about 1 hour and 6 minutes

-----------------------

We'll let A stand for total length of time for Plan A, and B stand for total length of time for Plan B

We'll let W stand for Wednesday, and T stand for Thursday...

We'll let z stand for total amount of clients for that plan...

~~~~

We know, for Plan A, on Wednesday there were 3 clients, and Thursday there were 5 clients

We also know for Plan B, on Wednesday there were 2 clients, and Thursday there were 6 clients

~~~~~

(3W + 5T)/z = A

(3(1.2) + 5(1.1))/8 = A

(3.6 + 5.5)/8 = A

9.1/8 = A

Plan A = 1.1375 hours > 1 hour 8 minutes 15 seconds

(2W + 6T )/z ~ B

(2(1.2) + 6(1.1))/8 ~ B

(2.4 + 6.6)/8 ~ B

9/8 ~ B

Plan B ~ 1.125 hours > 1 hour 7 minutes 30 seconds

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

When ever the symbol " ~ " is used in an equation, it stands for "About"...

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Sorry for the mess up before....

8 0
4 years ago
This is a problem on my little bro's homework. I'm not the best at math but this really confused me:
timurjin [86]
I think it would be 20/100
6 0
3 years ago
Can someone please help me with this math if you can will give brainly for correct answer
Leona [35]

Answer:

-44+-11=11

Step-by-step explanation:

la respuesta es 54 y sí está bien gracias ahora adiós que tengas un buen día 33. Entonces -44 + -11 = 11 pero esa es la billetera que tengo.

7 0
3 years ago
Read 2 more answers
For a fundraiser, Hailey raises $27, plus 1.50 for each lap she swims. What was the total amount raised by each swimmer after sw
svlad2 [7]

Question is Incomplete; Complete Question is given below;

For a fundraiser, Hailey raises $27, plus 1.50 for each lap she swims. Tariana raises $18, plus $3 for each lap she swims what is the total amount raised by each swimmer after swimming laps. after how many laps would the two swimmers have raised the same amount of money?

Answer:

If they swim 6 laps they would raise same amount of money.

The Total amount of money they raised is $36 after 6 laps.

Step-by-step explanation:

Let number of laps swim by the swimmers be x

Given:

Hailey raises $27, plus 1.50 for each lap she swims.

Hence It means amount raised by Hailey is the sum of $27 and 1.50 multiplied by Number of laps she swim.

Framing in equation form we get;

Amount of Money raised by Hailey = 27+1.5x

Also Given:

Tariana raises $18, plus 3 for each lap she swims.

Hence It means amount raised by Tariana is the sum of $18 and 3 multiplied by Number of laps she swim.

Framing in equation form we get;

Amount of Money raised by Tariana = 18+3x

Hence The expression representing the Total amount raised by Hailey is 27+1.5x and by Tariana is 18+3x,

Now We need to find the Number of laps they swim so as the would raise the same amount of Money;

Hence equation can be framed as;

27+1.5x=18+3x\\

Combining common terms we get;

3x-1.5x=27-18\\\\1.5x= 9\\\\x=\frac{9}{1.5} =6

Hence If they swim 6 laps they would raise same amount of money.

Now we will find the amount they both will raise by substituting the value of x we get;

Amount of Money raised by Hailey = 27+1.5x = 27+1.5\times 6 = 27+9 =\$36

Amount of Money raised by Tariana = 18+3x= 18+3\times 6 = 18+18=\$36

Hence The Total amount of money they raised is $36 after 6 laps.

8 0
4 years ago
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