Answer:
Step-by-step explanation:
8m² - 2m - 15
= 8m² - ( 12 - 10 ) m - 15
= 8m² - 12m + 10m - 15
= 4m(2m -3) + 5 ( 2m - 3)
=( 2m - 3)(4m + 5)
Answer:
80%
Step-by-step explanation:
To find what percent a part is of the whole, divide the part by the whole and multiply by 100%.
percent = 20/25 * 100% = 80%
Answer:
19,725
Step-by-step explanation:
Answer:
c.145.3 to 154.7.
Step-by-step explanation:
We have 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 Z-table as such z has a p-value of .
That is z with a p-value of , so Z = 1.645.
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 150 - 4.7 = 145.3.
The upper end of the interval is the sample mean added to M. So it is 150 + 4.7 = 154.7.
Thus the correct answer is given by option c.
Answer:
-20
Step-by-step explanation: