Answer:
538 books should be tested.
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.
How many books should be tested to estimate the average force required to break the binding to within 0.08 lb with 99% confidence?
n books should be tested.
n is found when
We have that
Rounding up
538 books should be tested.
Answer:
x = -3
Step-by-step explanation:
2x - 3y = -12 ------------------(i)
4x + y = -10 -------------------(ii)
Multiply the (ii) equation by 3 and then add the two equations. So, now y will be eliminated and you will get the value of x
(i) 2x - 3y = -12
(ii) * 3 <u>12x + 3y = -30</u>
14x = - 42
x = -42/14
x = -3
Answer:
( $ 120 )
Step-by-step explanation:
cause
p they original price given
p - 2p = 96
8 p = 96
p = 120
sana makatulong carry on
Answer:
it's a little bit confusing and not too clear but the third one should be correct
The answer is the 4th option,
x+y=6 and x-y= -10