Answer:
1.17.9
2. 120.61
Step-by-step explanation:
it is equal to 2 1/2
Step-by-step explanation:
can I have brainlest plsss
Answer:
forma is h * w / 2 and y and x have no value because there are no numbers to calculate.
Step-by-step explanation:
hope this helps!!!!!
Answer:
The margin of error for a confidence interval for the population mean with a 90% confidence level is 0.53 hours.
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.
In this quesstion:

So
The margin of error for a confidence interval for the population mean with a 90% confidence level is 0.53 hours.
Step-by-step explanation:
7x+3y=42.
y=-5x+30.
7x+3(-5x+30)=42
7x-15x+90=42
8x=42-90
-8x=-48
x=-48/-8
x=6
y=-5x+30
y=-5×6+30
=-30+30
y=0
(6,0)