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3 years ago

11

Use your knowledge about the volumes of cones and cylinders to find a volume for a solid hemisphere of radius R.

1 answer:

TiliK225 [7]3 years ago

4 0

Answer:

$\frac{4}{3} R^{3}\pi$

Step-by-step explanation:

The formula for calculating the volume of any sphere is 4/3 of the cubic radius by pi, so you just have to insert the values that you are given in the problem, and you can get an answer, in this case the value for radius is "r" so we are left basically with the next solved fromula: $\frac{4}{3} R^{3}\pi$

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Please answer my question

babunello [35]

Answer:

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Step-by-step explanation:

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2 years ago

One solution to a quadratic function, h, is given.

Margaret [11]

Answer:

B. The other solution to function $h$ is $-4-i\,7$ .

Step-by-step explanation:

From Algebra, we remember that quadratic functions of the form $a\cdot x^{2}+b\cdot x + c$ has solutions of the form:

$x = \frac{-b\pm \sqrt{b^{2}-4\cdot a\cdot c}}{2\cdot a}$ , where both are complex if and only if $\sqrt{b^{2}-4\cdot a \cdot c}< 0$ .

Hence, if one solution of the quadratic function is $-4+i\,7$ , then the other solution is $-4-i\,7$ . The correct answer is B.

7 0

2 years ago

A computer scans every 2.75 days and another scans every 3.5 days

Brut [27]

Answer:

Alright, so we have to find the LCM of 2.75 and 3.5.

A good start would be to multiply them together to get 9.625, but we want a whole day!

This would be every 77 days :)

5 0

2 years ago

Vikki [24]

Answer:

148.12m²

Step-by-step explanation:

At first, lets find the area of rectangle.

length = 14m

breadth = 6m

Area of rectangle = length x breadth

= 14 x 6

= 84m²

Now, For the area of sector of the circle,

Given angle (a) = 34

radius = 14m

Area of the sector = a / 360 x pi x r²

= 34/360 x 3.14 x 14²

= 34 / 360 x 3.14 x 196

= 58.12m²

Now adding both areas,

84 + 58.12 = 142.12m²

4 0

2 years ago

In the figure below an angle that is supplementary to angel FAB is:

Vlad1618 [11]

Answer:

CAB

Step-by-step explanation:

Angle CAB and Angle FAB together make 180 degrees(straight angle) . A supplementary angles equal to 180 degrees.

3 0

3 years ago