Answer:
multiply the cost of the ice cream cones by the amount of friends then add the cost of the birthday cake.
example: (2.49 × n) + 24.99 = a
I would give you an answer but I dont have enough information, I'm sorry for the inconvenience.
Answer:
The 80% confidence interval for the population mean is between 28.32 characters and 31.68 characters.
Step-by-step explanation:
We have the standard deviation for the population, so we can use the normal distribution. If we had the standard deviation for the sample, we would have to use the t-distribution.
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 30 - 1.68 = 28.32 characters.
The upper end of the interval is the sample mean added to M. So it is 30 + 1.68 = 31.68 characters.
The 80% confidence interval for the population mean is between 28.32 characters and 31.68 characters.
Answer:
4355
Step-by-step explanation:
So first we will see how much is each hour
650 kilometres per hour.
So next we can work out how is 6 hours since that is easy.
650 X 6 = 3900
Next is the 42 mins
All you need to do is
650/ 60 = 65/6
65/6 X 42 = 455
Last step:
3900 + 455 = 4355
Done!
Hope I helped!
Answer: 5/10 or 1/2
Step-by-step explanation:
Answer:
B and D
Step-by-step explanation:
the answer is B and D