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Nina [5.8K]
3 years ago
15

Joseph made a model rocket by attaching a cone

Mathematics
1 answer:
Lerok [7]3 years ago
4 0

Answer:

Area = 270π inches squared. Volume = 550π inches cubed

Step-by-step explanation:

Surface Area:

Cylinder Area=2πrh+2πr^2= 180π+50π=230π inches squared.

Cone Area = πr(r+√(h^2+r^2)) = 5π(18) = 90π inches squared.

Total Area = 230π+90π = 320π inches squared.

Total Area - base = 320π-50π = 270π inches squared.

Volume:

Cylinder volume = πr^2h = 450π inches cubed

Cone volume = πr^2(h/3) = 100π inches cubed

Total Volume = 550π inches cubed

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topjm [15]

Answer:

The top one would be the answer

7 0
2 years ago
A circle has a circumference of 28 centimeters. If an arc subtends a central angle of 55 degrees, what is the arc length?
Harlamova29_29 [7]

Answer:

s = 4.28 cm (Answer A)

Step-by-step explanation:

1) The formula for the circumference of a circle of radius r is C = 2(pi)r, and this corresponds to a full circle, with central angle 360 degrees.  

2) Here the circumference is 28 cm.  Therefore, solving for the radius involves the following calculation:   28 cm = 2(pi)r, or

r = (28 cm) / (2 pi), or (28 cm) / 6.28 = 4.46 cm.  

3) The arc length s = r(theta), when the central angle (theta) is 55 degrees, is (55/360) times the circumference of the circle:  (55/360)(28 cm), or

s = 4.28 cm (Answer A)

3 0
3 years ago
What’s this answer plzz
Mumz [18]

Answer:

y=1/2x+7

Step-by-step explanation:

No work needed

8 0
3 years ago
In a the department store a $50 dresses is Marked save 25% what is the discount what sale price of the dress
NemiM [27]

Answer:

Discount of $12.50.

Sale price is $37.50.

Step-by-step explanation:

Since the dress is "Marked save 25%" this means yuo pay 75% of the $50 price. Remember, 100-25 = 75. This means you pay 0.75*50 = $37.50 and yuo got a discount of $12.50.

$50 - 37.50 = 12.50

7 0
3 years ago
Evaluate each expression for d = -3.
tamaranim1 [39]

Answer:

d = - 3

Step-by-step explanation:

There's no expression

6 0
3 years ago
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