Answer:
The lower bound of the interval is 88.9mm and the upper bound is 93.1mm.
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 M as such

In which
is the standard deviation of the population and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 91 - 2.1 = 88.9mm.
The upper end of the interval is the sample mean added to M. So it is 91 + 2.1 = 93.1 mm
The lower bound of the interval is 88.9mm and the upper bound is 93.1mm.
24/6=4
(6x4)+(2x4)+(3x4)=
24+8+12=44=answer!
Answer:
y = 1250
Step-by-step explanation:

x = 3
y = y
Substitute x into equation

Simplify 
y = 10 * 125
y = 1250
Hope this helps :)
Answer:
y = |x-2|
Step-by-step explanation:
the basic function is |x|, (I'm going to assume that you should have learned this in class by now, and you need to know that to continue
anyways, y = |x| is what you would normally see, with the center on (0,0)
however, this has been translated 2 units to the right, and based on translation rules, right-left shifts are unit shifts within the x parentheses so, y = |x-2|
if you dont believe me plug it into an online graphing calculator
hope this helps
Answer:
The area is 189 square meter.
Step-by-step explanation:
In this figure we have one square of 7 meter sides and one rectangle of 20 meter length and 7 meter of width.
Area of a square = side²
area of a rectangle = Length × width
Area of the square = 7² = 7 × 7 = 49 meter²
Area of the rectangle = 20 × 7 = 140 meter²
Area of the composite figure = 49 + 140
= 189 meter²
The area is 189 square meter.