We can see that revolving the region formed by intersecting 3 lines, we will get 2 cones that are connected their bases.
Volume of the cone V=1/3 *πr²*h
1) small cone has r=5, and h=5
Volume small cone V1= 1/3 *π*5²*5 = 5³/3 *π
2) large cone has r=5, and h=21-6=15, h=15
Volume large cone V2= 1/3 *π*5²*15 = 5³*π
3) whole volume
5³/3 *π + 5³*π=5³π(1/3+1)=((5³*4)/3)π=(500/3)π≈166.7π≈523.6
Area
we see 2 right triangles,
Area of the triangle=1/2*b*h, where b -base, h -height
1) small one, b=5, h=5
A1=(1/2)*5*5=25/2
2)large one, b=5, h=15
A2=(1/2)*5*15=75/2
3)
whole area=A1+A2=25/2+75/2=100/2=
50
Answer: 30%
Step-by-step explanation:
Total number of people involved in the tournament= 50
Number of people chosen to play rugby= 35
Number of people chosen to play football= 15
To get the percentage of people that are chosen to play football, we divide the number of people chosen to play football by the total number of people chosen for the tournament and then multiply the answer by 100. This will be:
= 15/50 × 100
= 0.3 × 100
= 30%
The percentage of people chosen to play football is 30%.
The answer would be -142, because you have to keep subtracting 3 and I got -142
<em>The discriminant must be zero.</em>
Step-by-step explanation:
A Perfect-Square Trinomial is given by the form:

The discriminant in the quadratic formula is:

So in order to get a perfect square,<em> the discriminant must be zero.</em>
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Discriminant: brainly.com/question/1537997
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