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3 years ago

What solid is generated when a rectangle is rotated about a line.? a)rectangular pyramid b)cylinder c) rectangular prism d) cone

Mathematics

2 answers:

dlinn [17]3 years ago

8 0

I believe it is a cylinder.

vesna_86 [32]3 years ago

6 0

A solid is a three-dimensional figure obtained by rotating a two-dimensional figure around a straight line .

Different two dimensional figure give different three dimensional figure .

A cone is formed by rotating a right triangle about any line,a sphere is formed by rotating a circle .

If we look at the figure formed by rotating a rectangle around a line the three dimensional figure formed is a cylinder.

The answer is option b)cylinder .

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If a 750 ml bottle of juice costs £1.90 and a 1 litre bottle of the same juice costs £2.50 then the 750 ml bottle is better valu

frozen [14]

Answer:

The 1 liter bottle is better value

Step-by-step explanation:

Cost of 750 ml = £1.90

Cost of 1 liter = £2.50

1000 ml = 1 liter

Cost per 250 ml

750 ml / 3 = £1.90 / 3

250 ml = £0.6333333333333

Approximately,

£ 0.633

Cost per 250 ml

1 liter / 4 = £2.50 / 4

250 ml = £0.625

The 750 ml bottle is not a better value

The 1 liter bottle is better value

5 0

3 years ago

Two cyclists are 7 miles apart when they begin biking away from each other in

shutvik [7]

Answer:

Step-by-step explanation:

Its just 25

7 0

3 years ago

12. When 64 is divided by x, the quotient is a negative

sergey [27]

J. -8 is the correct answer

8 0

3 years ago

What is the slope of the line that passes through (1, 4) and (1, −3)?

Mazyrski [523]

The formula of a slope:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

We have the points (1, 4) and (1, -3). Substitute:

$m=\dfrac{-3-4}{1-1}=\dfrac{-7}{0}\qquad\boxed{!!!!}$

DIVISION BY ZERO!!!

Answer: The slope is undefined.

It's a vertical line x = 1.

6 0

3 years ago

Sine, cosines and tangent of 30 45 and 60 degrees

bonufazy [111]

Answer:

Sine 30 =

$\frac{1}{2}$

Sine 45 =

$\sqrt{ \frac{2}{2} }$

Sine 60 =

$\sqrt{ \frac{3}{2} }$

Cos 30 =

$\sqrt{ \frac{3}{2} }$

Cos 45 =

$\sqrt{ \frac{2}{2} }$

Cos 60 =

$\frac{1}{2}$

Tan 30 =

$\sqrt{ \frac{3}{3} }$

Tan 45 =

$1$

Tan 60 =

$\sqrt{3}$

Step-by-step explanation:

I hope it helps

3 0

3 years ago