The sample size should be 31.
We use the formula
To find the z-score for 99% confidence:
Convert 99% to a decimal = 0.99
Subtract from 1: 1-0.99 = 0.01
Divide by 2: 0.01/2 = 0.005
Subtract from 1: 1-0.005 = 0.995
Using a z-table (http://www.z-table.com) we can see that this value falls between 2.57 and 2.58; we will use 2.575. Using this for z, our value for σ and our value for E, we have:
Answer:
1
Step-by-step explanation:
l 10 - 11 l = |-1|= 1
Ok so the radius is half the diameter, and the diameter is half the circle. And the area is the space inside a circle. And pie is 3.14.
So if your radius is 10 then you will multiply 10 x 10 to get 100. Then multiply 100 x pie or 3.14 which you will get, 314cm². So your answer is 314cm²
The formula for an area of a circle is radius x radius = ?
Then multiply pie, 3.14 by your new radius x radius, and you got your answer.
Answer:
<em>16/35</em>
Step-by-step explanation:
From the question we are given:
total number of cupcakes needed for the school dance = 140 cupcakes
Lucy made 35cupckes
JoJo made 42 cupcakes
Total cupcakes made by JoJo and Lucy = 35+42 = 76cupcakes
Remaining cupcakes still needed to be made = 140 - 76 = 64cupckes
Fraction of the cupcakes that Lucy and JoJo still need to make = 64/140
Fraction of the cupcakes that Lucy and JoJo still need to make = 16/35
<em>Hence the fraction of the cupcakes that Lucy and JoJo still need to make is 16/35</em>
Answer:
1000+700+6+160+ 4320
Step-by-step explanation:
- 1 x 1000= 1000
- 7 x 10 = 70
- 6 x 1 = 6
4320+1000+160+70+6
I just did it in order.
Just in case you need that added