Answer
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Step-by-step explanation:
thanks
Answer:
= 4√53 units
that is option(a)
Step-by-step explanation:
all sides of the square are of the same length
so if we get the length if this side, we can calculate its perimeter
there's this formula,
<u>side length between two points, let's say A(x, y) and B(p, q), is equal to </u>
so here we go,
the same points A and B here are
(4, 7) and (-3, 5)
therefore, side length :-
the side length comes out to be <u>√(</u><u>53</u><u>) </u>
now perimeter of a square is
4 × side length
= 4√53 units
Answer:
Total, 2 milkshakes, and 3 cokes would cost $12.50
Step-by-step explanation:
The cokes cost $11.50 and the milkshakes $10.00
That is a very good question....
Look Grank
you know that:
confidence interval = mean +or- Margin of Error
and
Margin of Error = (z)*(standard deviation) / (sqrt of n)
where n is the number of sample records
So we need to calculate z-value firstly
It says: "<span>we want 90% confidence"
So that:
</span>
<span>confidence90% corresponds to z-value of 1.645
Plug that into our formula of </span><span>Margin of Error:
</span>Margin of Error = (1.645)*(22) / (sqrt of n)
"The sample mean is within 2.7 lb of the population mean" means that Margin of Error is 2.7
<span>Margin of Error:
</span>2.7 = (1.645)*(22) / (sqrt of n)
Now solve for n:
n=179.66~180
SO that 180<span> women must be randomly selected to estimate the mean weight of women in one age group.</span>
Answer:
A) increasing x > -1 ; decreasing x <-1
Step-by-step explanation:
We use the given graph to find the intervals where the function is increasing , decreasing and constant
We analyze the graph from the left
From the left the graph starts decreasing and it is decreasing till -1
From the point (-1,0) the graph changes direction and starts increasing
So we can say that the function is decreasing from -infinity to -1
and increasing from -1 to infinity
decreasing from -infinity to -1 means decreasing x <-1
increasing from -1 to infinity means increasing x > -1
