Answer:
40%
Step-by-step explanation:
8/20
Divide it to get a decimal.
8/20 = 2/5 = 0.4
Change the decimal into a percent by moving the decimal point 2 places to the right.
0.4 = 40%
Answer:
We need an SRS of scores of at least 153.
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 M as such
In which 
is the standard deviation of the population and n is the size of the sample.
How large an SRS of scores must you choose?
This is at least n, in which n is found when 
. So
Rounding to the next whole number, 153
We need an SRS of scores of at least 153.
Answer:
8x + 3
Step-by-step explanation:
=5x+−7+3x+10
=(5x+3x)+(−7+10)
=8x+3
Answer:
72
Step-by-step explanation:
By using the fundamental counting principle, we can do 4 x 3 x 6 = 72 to find how many different sandwiches can be made.
7n +13p + -5 = 15 Hope I helped
