Answer:
366 square inches
Step-by-step explanation:
Surface Area Formula:
A= 2( w*l + h*l + h*w)
So you substitute the numbers:
A= 2(3*9 + 13*9 + 13*3)
A= 2( 27+ 117 + 39)
A= 54+234+78
A= 366 square inches
There you go :)
Answer:
Mailing preparation takes 38.29 min max time to prepare the mails.
Step-by-step explanation:
Given:
Mean:35 min
standard deviation:2 min
and 95% confidence interval.
To Find:
In normal distribution mailing preparation time taken less than.
i.eP(t<x)=?
Solution:
Here t -time and x -required time
mean time 35 min
5 % will not have true mean value . with 95 % confidence.
Question is asked as ,preparation takes less than time means what is max time that preparation will take to prepare mails.
No mail take more time than that time .
by Z-score or by confidence interval is
Z=(X-mean)/standard deviation.
Z=1.96 at 95 % confidence interval.
1.96=(X-35)/2
3.92=(x-35)
X=38.29 min
or
Confidence interval =35±Z*standard deviation
=35±1.96*2
=35±3.92
=38.29 or 31.71 min
But we require the max time i.e 38.29 min
And by observation we can also conclude the max time from options as 38.29 min.
Given:
Diameter of the hole = 30 cm
To find:
The area of the hole.
Solution:
The radius of a circle is always half of the diameter. It is given that the diameter of the hole is 30 cm. So, the radius of the hole is:
Area of a circle is:
Putting 
and in the above formula, we get
Therefore, the area of the hold is 706.5 square cm.
Add all the prices together:
3.50 + 10.00 + 9.95 + 6.25 = 29.70
He has 30, so he had 30 - 29.70 = 0.30 left over for fish.
The two fish cost 4.50 + 4.50 = 9.00
He would need 9.00 - 0.30 = $8.70 more money
