I can't resist helping someone with magic <span>(ノ◕ヮ◕)ノ*:・゚✧
The formula for the volume of a cylinder is pi x r^2 x h.
That's 10240 x pi or 3</span><span>2169.91
</span>(ノ◕ヮ◕)ノ*:・゚✧ woosh you now have smol pener
Answer:
The number of tests required is 330.
Step-by-step explanation:
We have to find the total number of combinations of four wires.
Combinations formula:
is the number of different combinations of x objects from a set of n elements, given by the following formula.

In this question:
Four wires from a set of 11.
So

The number of tests required is 330.
Answer: There are 152 adults and 87 children.
Step-by-step explanation:
Let x= Number of adults
y= Number of children
As per given, we have
x+y = 239 (i)
15x+5.50y= 2758.50 (ii)
Multiply 5.50 on both sides of (i) , we get
5.50x+5.50y=1314.5 (iii)
Subtract (iii) from (ii), we get
9.5x = 1444
⇒ x = 152
Put value of x in (i) , we get
152+y=239
⇒ y= 239-152
⇒ y= 87
Hence, there are 152 adults and 87 children.