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iris [78.8K]
3 years ago
9

The distance to the moon is 238,900 miles. How is this expressed in scientific notation?

Mathematics
1 answer:
Mashutka [201]3 years ago
5 0
The answer would be b
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An icicle with a diameter of 15.5 centimeters at the top, tapers down in the shape of a cone with a length of
Helga [31]

Answer:

Step-by-step explanation:

Note: I will leave the answers as fraction and in terms of pi unless the question states rounding conditions to ensure maximum precision.

From the question, we can tell it is a inversed-cone (upside down)

Volume of Cone = \pi r^{2} \frac{h}{3}

a) Given Diameter , d = 15.5cm and Length , h = 350cm,

we first find the radius.

r = \frac{d}{2} \\=\frac{15.5}{2} \\=7.75cm

We will now find the volume of the cone.

Volume of cone  \pi (7.75)^{2} \frac{350}{3} \\= \frac{168175\pi }{24}

We know the density of ice is 0.93 grams per 1cm^{3}

1cm^{3} =0.93g\\\frac{168175\pi }{24}  cm^{3} =0.93(\frac{168175\pi }{24} )\\= 20473 g(Nearest Gram)

b) After 1 hour, we know that the new radius = 7.75cm - 0.35cm = 7.4cm

and the new length, h = 350cm - 15cm = 335cm

Now we will find the volume of this newly-shaped cone.

Volume of cone = \pi (7.4)^{2} \frac{335}{3} \\= \frac{91723\pi }{15} cm^{3}

Volume of cone being melted = New Volume - Original volume

= \frac{168175\pi }{24} -\frac{91723\pi }{15} \\= \frac{35697\pi }{40} cm^{3}

c) Lets take the bucket as a round cylinder.

Given radius of bucket, r = 12.5cm (Half of Diameter) and h , height = 30cm.

Volume of cylinder = \pi r^{2} h\\=\pi (12.5)^{2} (30)\\=\frac{9375\pi }{2} cm^{3}

To overflow the bucket, the volume of ice melted must be more than the bucket volume.

Volume of ice melted after 5 hours = 5(\frac{35697\pi }{40} )\\=\frac{35697\pi }{8} cm^{3}

See, from here of course you are unable to tell whether the bucket will overflow as all are in fractions, but fret not, we can just find the difference.

Volume of bucket - Volume of ice melted after 5 hours

= \frac{9375\pi }{2} -\frac{35697\pi }{8 } \\=\frac{1803\pi }{8}cm^{3}

from we can see the bucket can still hold more melted ice even after 5 hours therefore it will not overflow.

4 0
2 years ago
What is the value of x in the equation? 6(x +1) -5x = 8 + 2(x - 1)
Artyom0805 [142]

Answer:

x = 0

Step-by-step explanation:

7 0
3 years ago
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Explain why two obtuse angles cannot be supplementary to another.
Nuetrik [128]
It's impossible. Supplements need to add up to 180 degrees, and in order to be obtuse, the angles would both need to be larger than 90 degrees.
5 0
3 years ago
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What is the value of the expression 53.5-5? please explain ​
tatuchka [14]
48.5 is the answer.
Reason- an expression is an equation without an equal sign and this expression is saying 53.5 - 5.
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3 years ago
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Please help i’ll give u brainlist
rjkz [21]
I don’t know a thing about math and I should be doing my exam but I’ll guess on this


Y=3x domain: (1,0,1,2) I’m too lazy to type the range

Y=x+2 domain: (-3,-2,2,3)

Y=-x domain: (-2,0,2,4)

Y=2x+1 domain: (-2,-1,0,1)

6 0
3 years ago
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