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3 years ago

Work out the volume of this sphere 19cm

Mathematics

2 answers:

Nonamiya [84]3 years ago

7 0

V=4/3πr3

The answer is V≈28730.91

MrRa [10]3 years ago

5 0

Answer:

Step-by-step explanation:

I dont know if the radius is 19cm or 9.5cm so ill just do both

19cm

$V=\frac{4}{3} \pi r^3\\=\frac{4}{3} *\pi *19^3\\=28730.91cm^3$

9.5cm

$V=\frac{4}{3} \pi r^3\\=\frac{4}{3} *\pi *9.5^3\\=3591.36cm^3$

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A custom rectangular tabletop has a length that is twice it’s width, and the tabletop measures 76 inches on its diagonal. What a

Sunny_sXe [5.5K]

Answer:

The dimensions of the tabletop: Length= 67.976... inches and Width= 33.988... inches and the perimeter will be 203.929... inches.

Step-by-step explanation:

Suppose, the width of the rectangular tabletop is $x$ inch.

As the tabletop has a length that is twice it’s width, so the length will be: $2x$ inch.

The tabletop measures 76 inches on its diagonal.

Formula for length of diagonal of rectangle: $d=\sqrt{l^2+w^2}$

So, the equation will be..........

$76=\sqrt{(2x)^2+ x^2}\\ \\ 76=\sqrt{4x^2+x^2} \\ \\ 76=\sqrt{5x^2} \\ \\ 5x^2= 76^2= 5776\\ \\ x^2= \frac{5776}{5}=1155.2 \\ \\ x= \sqrt{1155.2} =33.988...$

Thus, the width of the tabletop is 33.988... inches and the length will be: (2×33.988...) = 67.976... inches.

The perimeter will be: 2(33.988...+ 67.976...) inches = 203.929... inches.

5 0

3 years ago

Which of the following shows a group of possible angles a triangle could have?

maw [93]

Answer:

D) 50, 60, 70

Step-by-step explanation:

The reason why it's D since a regular triangle equals up to 180 degrees in total and D is the only one that equals 180.

50+60+70= 180 degrees

Hope this helps

8 0

2 years ago

Write a point slope form of the line through point J(4,1) with slope -5

mrs_skeptik [129]

Y - y1 = m(x - x1)
slope(m) = -5
(4,1)...x1 = 4 and y1 = 1
now we sub
y - 1 = -5(x - 4) <===

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3 years ago

Read 2 more answers

What is the y-intercept of the line?

Vaselesa [24]

Answer:

Step-by-step explanation:

The y-intercept is the point at which the line pases the y-axis.

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2 years ago

A woman is purchasing fruit for some pies she is making for a party she wants to purchase at least 10 pounds of strawberries and

dlinn [17]

Answer: 5 pounds strawberries and 5 pounds blueberries

Step-by-step explanation:

s+b=10

2s+b3=25

b=10-s

2s+3(10-s)=25

2s+30-3s=25

-s=-5

s=5

b=10-5

b=5

5 0

3 years ago