A prime number is a number greater than one and can only be divided by 1 and itself. The result is always a whole number, i.e. no fractions, decimals, remainders.
<span>Example: </span>
<span>2 can only be divided by 1 and itself </span>
<span>3 can only be divided by 1 and itself. </span>
<span>4 however, can be divided by 1 or 2 or itself </span>
<span>1 is not a prime number since it is not greater than one.</span>
Answer:
60
Step-by-step explanation:
Using the triangle exterior theorem the two non adjacent interior angles add up to the adjacent exterior angle so 49+x=109, x=60
Answer:
8 less then the quotient of 42 and a number
a " quotient " is the result of division
(42 / n ) - 8.....when n = 6
(42/6) - 8 =
7 - 8 =
-1
so when n = 6, the expression = -1
Step-by-step explanation:
Answer:
The minimum sample size is needed to be 90% confident that the sample mean is within 1 day of the true population mean is 25.
Step-by-step explanation:
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.
If the population standard deviation is 3 days, what minimum sample size is needed to be 90% confident that the sample mean is within 1 day of the true population mean?
This is n when
. So





Rouding up to the nearest integer, 25.
The minimum sample size is needed to be 90% confident that the sample mean is within 1 day of the true population mean is 25.
Answer:
plug it into your calculator
and you get
or 1.44 to 3 sf.