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Arisa [49]
1 year ago
14

The volume of a certain right circular cone is 30 cubic inches. What is the volume, in cubic inches, of a second right circular

cone with half the radius and twice the height of the first cone
Mathematics
1 answer:
mrs_skeptik [129]1 year ago
3 0

Answer:

V = 15 in.³

Step-by-step explanation:

The original cylinder has radius r and height h.

V = πr²h

Its volume is 30 in.³, so

πr²h = 30 in.³

The new cylinder has radius (1/2)r and height 2h.

Its volume is

V = π(r/2)²(2h)

V = πr² × 2h/4

V = πr²h/2

πr²h is the volume of the original cylinder, and it is 30 in.³.

V = 30 in.³/2

V = 15 in.³

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Solve for each variable and tell how you found the value of each.
AleksAgata [21]

Answer:

A:38 c:54

Step-by-step explanation:

First off, I did the easiest which was a. i found the value of A by subtracting 180 by 142. because a flat line is 180 degrees.

For C, It was more difficult. I subtracted 88 by the value of A, since the value of A is the same as the one next to 88. So I subtracted 126 (88+38) and got 54.  

Fortunately, I couldn't figure out B though, but i think it is a similar answer to c.  

6 0
2 years ago
PLEASE MAKE SURE HELP ME!
bulgar [2K]

Answer:

1. The first problem is wrong, it should be 0.5(3(15) + 2(20)) because the parentheses make sure that every purchased item is being divided by 2 (multiplying by 0.5 is the same as dividing by 2)

2. The second problem is partially correct. The first two answers you have checked are correct, but the last one is wrong. The third answer should be 6 + 12 instead because that's just a simplified version of 2(3) + 6(2), meaning they are equal

3. I cannot read your answers in the "Why or Why Not" column in the third problem, but the answers you gave in the "Evaluate" and "Does It Work?" columns are all correct.

7 0
3 years ago
What number should be added to both sides of the equation to complete the square?<br> x^2+ 8x = 4
Sonbull [250]

Answer:

16

Step-by-step explanation:

use the formula (b/2)^2 to find what number to add to each side of the equation

3 0
3 years ago
How many edges does a rectanglar prism have?
natta225 [31]

It has 12 edges in total

3 0
3 years ago
Did I find the area of the composite figures correctly in the pic? If not, help pls?
Annette [7]
No, in problem 1
you said that area of triangle=bh when it should be 1/2bh
the area should be 9 not 18 so triange=9
aera of rectangle is correct
so
27+9=36 in^2 is answer



2. it is 1 rectangle 1 triangle 1 square  you forgot the square
rectangle=12 times 4=48
square=4 times 4=16
triangle=1/2bh=1/2(8)4=16
add

48+16+16=80 in^2


remember that
triangle=1/2(base times height)
draw immaginary lines and split shapes, it could help to seperate shapes or/and mmove them around and regroup them
8 0
3 years ago
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