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mamaluj [8]
3 years ago
12

The angle is less than 180 degrees, but more than 90 degrees.

Mathematics
1 answer:
BabaBlast [244]3 years ago
3 0
The answer would be: a. Obtuse angle

Obtuse angles go from 91 degrees to 179 degrees.
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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
(-57)-(+12) <br>find the difference​
Airida [17]

Answer:

siiiii

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
I need these answers, does anyone know how to do it? this assignment is 20 points!
34kurt

Answer:

1. 3

2. -2

3. (1, 2)

Step-by-step explanation:

y axis is the numbered line that looks like the |

x axis is _

so the y int is 3 because A intercepts the y axis at 3

the y int for B is -2 because it intercepts the y axis at -2

the intersection of both lines is (1, 2) because you look and the point is at 1 for x and 2 for y

8 0
3 years ago
Read 2 more answers
Work out the base of a square with area, A = 100cm?<br> b=
iren2701 [21]
10cm because the base and height have to be same as it’s a square and 10 x 10 is 100
6 0
3 years ago
Help help help help help
dem82 [27]
I believe it should be B because it says one more than twice the number so that means addition. Also it says twice the number so that should be 2w.
I’m not 100% sure but it is my best guess
7 0
3 years ago
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