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3 years ago

If the diameter of a sphere is 1 meter, then what is its surface area? Leave your answer in terms of π= 3.14

2 answers:

4 0

Surface area of a sphere = 4 pi r^2

when r = 1/2 meter ( because diameter = 2r = 1) the surface area

= 4 * 3.14 * 0.5^2 = 3.14 square meters

umka21 [38]3 years ago

3 0

surface area = 4 x pi x r^2

diameter = 1 so radius = 1/2 = 0.5

4 x 3.14 x 0.5^2 = 3.14 meters^2

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PLEEEEEEEAAAAAAASSSSSSSSSSEEEEEEEEEEE help me!!!!!!!!!!

defon

Answer:

$\boxed{\sf \ \ \ \dfrac{18}{(x-7)(x+12)(x+30)} \ \ \ }$

Step-by-step explanation:

hello,

first of all we will study the quadratic expressions

we can write that, (the different answers provide good clues :-) )

$x^2+5x-84=(x-7)(x+12)$

and

$x^2+23x-210=(x-7)(x+30)$

so first of all as we cannot divide by 0 we need to take x different from 7, -12 and -30 and then we can write

$\dfrac{1}{x^2+5x-48}-\dfrac{1}{x^2+23x-210}=\dfrac{1}{(x-7)(x+12)}-\dfrac{1}{(x-7)(x+30)}\\\\=\dfrac{(x+30) -(x+12)}{(x-7)(x+12)(x+30)}=\dfrac{x+30-x-12}{(x-7)(x+12)(x+30)}\\\\=\dfrac{18}{(x-7)(x+12)(x+30)}$

hope this helps

7 0

3 years ago

What is the approximate mass of one mole of oxygen gas (O2).

nata0808 [166]

It will be d cause all you doing is rearranging everything

4 0

3 years ago

Read 2 more answers

Find the area. Round to the nearest hundredth when necessary. Be sure you are showing all work to find each figure.

eimsori [14]

Additional requirements in figure :-

Mark point :-

Draw a straight line from E to AB .

And the point line joins mark it as "F" .

It will generate quadrilateral FBCD.

we get to know In quadrilateral left angle is 90°

How ?

{

proof :

As three angles are given 90° So third angle will also be 90°

Reason:

→ Sum of interior angles = 2 (no. of angles - 2 × 180°

→Sum of interior angles = (4-2 × 180°)

→Sum of interior angles = (2 × 180°)

→Sum of interior angles = 360°

}

✿Now let the left angle be x

90° +90° + 90° + x = 360°
180° + 90° + x = 360°
270° + x = 360
x = 360° - 270°
x = 90°

we know :

Area of rectangle = Length × Breadth

STEPS :

Area of rectangle = Length × Breadth

Area of rectangle = 7 × 8

Area of rectangle = 56 in²

Now let's find EF :

EF = BD - EC

EF = 7 - 4

EF = 3 in

To find A

F :

A•F = AB - CD

A•F = 12 - 8

A•F = 4 in

In triangle AFE:

EF is base of triangle
A•F is height of triangle

We know :

Area of triangle =( Height × Base)/2

Steps :

Area of triangle = (Height × Base)/2
Area of triangle = (4 × 3)/2
Area of triangle = 12/2
Area of triangle = 6 in²

To find area of figure :

Area of figure = Area of rectangle + Area of triangle
Area of figure = 56 + 6
Area of figure = 62 in²

______________________

~WindyMint

5 0

2 years ago

witch rule can you use to find the nth term of an arithmetic sequence in witch the common difference is 5 and a12=63

rewona [7]

Any arithmetic sequence can be expressed as:

a(n)=a+d(n-1), a=initial term, d=common difference, n=term number

We are only told that d=5 and a(12)=63 so:

53=a+5(12-1)

53=a+60-5

53=a+55

a=-2 now we have solved for a and we can say:

a(n)=-2+5(n-1) which neatened up....

a(n)=-2+5n-5

a(n)=5n-7

The above is the rule to find the value of the nth term.

3 0

3 years ago

I need help please I’m stuck :(

mina [271]

Answer:

your answer is 6

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers