Answer:
a) 40 = 8b
b) b = 5
Step-by-step explanation:
(b) 40 = 8 × b
40 ÷ 8 = b
5 = b
Answer:
(47.3, 54.1)
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 
.
That is z with a pvalue of 
, so Z = 1.96.
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.
The lower end of the interval is the sample mean subtracted by M. So it is 50.7 - 3.4 = 47.3
The upper end of the interval is the sample mean added to M. So it is 50.7 + 3.4 = 54.1
The answer is (47.3, 54.1).
yes. The zero to the left of the decimal point does not affect the overall value of the problem when removed, since it is zero.
Answer:
C) 153.9 in²
Step-by-step explanation:
14 ÷ 2 = 7
π = 3.14
3.14×7×7 = 153.9 in²
hope this helps!
Answer:
the answer would be a rectangle
Step-by-step explanation:
A rhombus, like a rectangle, has two sets of parallel sides. A rhombus's top and bottom sides are slightly offset.
