im not sure but maybe look up how to calculate volume of a cone.. then go from there :D
Answer:
Step--by--step explanation:
In order for two lines to be perpendicular, their slopes must multiply together to equal to negative one
So we do negative one divided by 2/5 to get the slope of the red line
Which is -5/2
To check, we do 2/5 multiplied by -5/2 which equals to -1 so our answer is correct
Answer:
4(b-6)=b^2
Step-by-step explanation:
The difference would mean that it is subtraction and you multiply that difference by 4 and set it equal to b squared
Answer:
160 visitors.
Step-by-step explanation:
Given:
An average of 145 people visited a 4-day exhibition on the first 3 days, <u>means here average people visited in 3 days is given 145.</u>
Average = 145
Number of people, n = 3
Another 205 people visited the exhibition on the fourth day.
To find:
What is the average number of visitors per day ?
Solution:
<u>First of all we will find total number of people visited in 3 days:-</u>
As we know:
![Average=\frac{Sum\ of\ observation}{number\ of\ observation}](https://tex.z-dn.net/?f=Average%3D%5Cfrac%7BSum%5C%20of%5C%20observation%7D%7Bnumber%5C%20of%5C%20observation%7D)
![145=\frac{Sum\ of\ observation}{3}\\](https://tex.z-dn.net/?f=145%3D%5Cfrac%7BSum%5C%20of%5C%20observation%7D%7B3%7D%5C%5C)
Multiplying both sides by 3
![145\times3=\frac{Sum\ of\ observation}{3}\times3\\435=Sum\ of\ observations](https://tex.z-dn.net/?f=145%5Ctimes3%3D%5Cfrac%7BSum%5C%20of%5C%20observation%7D%7B3%7D%5Ctimes3%5C%5C435%3DSum%5C%20of%5C%20observations)
Thus, we found that total number of people visited in 3 days is 435 and as 205 people visited in fourth day, then total number of people increased to
435 + 205 = 640
Now, sum of total observations( total number of people ) = 640
And number of observation ( number of days ) = 4
Now, we will calculate average number of visitors visit per day :-
![Average=\frac{Sum\ of\ observation}{number\ of\ observation}](https://tex.z-dn.net/?f=Average%3D%5Cfrac%7BSum%5C%20of%5C%20observation%7D%7Bnumber%5C%20of%5C%20observation%7D)
![=\frac{640}{4} \\=160\ visitors](https://tex.z-dn.net/?f=%3D%5Cfrac%7B640%7D%7B4%7D%20%5C%5C%3D160%5C%20visitors)
Thus, the average number of visitors per day is 160 visitors.