Answer:
b. 224
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 problem:
We want to find n, when 
So
The nearest integer number to 223.9 is 224.
So the correct answer is:
b. 224
Answer:
2x + 15 = -23
x = -19
Step-by-step explanation:
2x + 15 = -23
2x+ 15-15 = -23 -15
2x = -38
2/2x = -38/2
x = -19
The height is 4 feet
the base is 16 and the opposite side of it is 4
You need to find the area
This shape, btw is called a trapezoid
Let's call the top horizontal line, a
the base, or bottom line, b
the height is h
The equation to solve for the area of a trapezoid is
A = (a+b)* h/2
Fill in the given
A = (4 + 16) * 4/2
A = (20) * 2
A = 40
Hope this helps
Step-by-step explanation:
y=-½x+3
your welcome .....
X<span> 3</span><span> + 3x</span><span> 2</span><span> + 9x + 27 R88 is the answer</span>
