Write five pounds for 2.49 as a unit rate round to the nearest hundred
2 answers:
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<h3>Answer: B) 2.9 approximately</h3>
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Explanation:
The weird or fancy looking E symbol is the greek uppercase letter sigma. It is effectively the english version of S to represent summation. So we add up all the terms to get this. Luckily this has already been done for us in the table where they wrote "sum = 34", so
From here, we substitute this into the formula, along with n = 5 since there are 5 items in the original list
So,
This computes the sample standard deviation. To get the population standard deviation, you'd basically change the "n-1" to simply "n", and the rest of the formula is identical.
Answer:
w≅8.46ft
Step-by-step explanation:
Data
focus=8
vertex=(0,0)
width=?
depth (y)=3ft
parabola equation: ; then for V=(0,0),
, be focus(f)=8in;
→
we have that y=3ft then ; but 1in≅0.083ft so
→ x=±2.82, finally w=3*2.82≅8.46ft
