Answer:
40cm^3
Step-by-step explanation:
volume of a cuboid formula: L*W*H
l=length
w=width
h=height
since ;length and width are already multiplied and given to us as 10, we can multiply 10 with 4 to get volume
10*4=40
40cm^3
hope this helps!
X is positive 2 and y is positive 1
Answer:
Step-by-step explanation:
We want to determine a 90% confidence interval for the mean amount of time that teens spend online each week.
Number of sample, n = 41
Mean, u = 43.1 hours
Standard deviation, s = 5.91 hours
For a confidence level of 90%, the corresponding z value is 1.645. This is determined from the normal distribution table.
We will apply the formula
Confidence interval
= mean +/- z ×standard deviation/√n
It becomes
43.1 ± 1.645 × 5.91/√41
= 43.1 ± 1.645 × 0.923
= 43.1 ± 1.52
The lower end of the confidence interval is 43.1 - 1.52 =41.58
The upper end of the confidence interval is 43.1 + 1.52 =44.62
Therefore, with 90% confidence interval, the mean amount of time that teens spend online each week is between 41.58 and 44.62
Answer:
7200
Step-by-step explanation:
7000
200
the seven is in thousand spot and 2 is in hundreds spot
Answer:
The area of the regular octagon is 
Step-by-step explanation:
we know that
The area of the regular polygon is equal to
where
P is the perimeter of the regular polygon
a is the apothem
<em>Find the perimeter P</em>
Find the area
