All categories

3 years ago

The surface area of a sphere with a diameter of 12 units is:

Mathematics

1 answer:

algol133 years ago

4 0

Answer:

452.39

Step-by-step explanation:

Using the formula

A=4pi r ^2

D=2r

A=pie r d^2

= pi. 12^2

=452.39

You might be interested in

Find the length of the third side. If necessary, round to the nearest tenth.<br> 3<br> 4

Blababa [14]

Answer:

Soory this question seems to be unfinished

find the lenghts of what shape, more info please

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Assume that the sales of a certain appliance dealer can be approximaed y sraig were $6000 in 1982 and $ 64,000 in 1987. Let x -

viktelen [127]

Answer:

$y=11,600x+6,000$

Yearly sales in 1990: $98,800.

Step-by-step explanation:

We have been given that the sales of a certain appliance dealer can be approximated by a straight line. Sales were $6000 in 1982 and $ 64,000 in 1987.

If at 1982, $x=0$ then at 1987 x will be 5.

Now, we have two points (0,6000) and (5,64000).

$\text{Slope}=\frac{64,000-6,000}{5-0}$

$\text{Slope}=\frac{58,000}{5}$

$\text{Slope}=11,600$

Now, we will represent this information in slope-intercept form of equation.

$y=mx+b$ , where,

m = Slope,

b = Initial value or y-intercept.

We have been given that at $x=0$ , the value of y is 6,000, so it will be y-intercept.

Substitute values:

$y=11,600x+6,000$

Therefore, the equation $S=11,600x+6,000$ represents yearly sales.

Now, we will find difference between 1990 and 1982.

$1990-1982=8$

To find yearly sales in 1990, we will substitute $x=8$ in the equation.

$S=11,600(8)+6,000$

$S=92,800+6,000$

$S=98,800$

Therefore, the yearly sales in 1990 would be $98,800.

6 0

3 years ago

Pls help quick Asap!!!!!!

notsponge [240]

Method A: I think is 31 because you first have to get out of the negatives which is already 12, then you have to go to positive 19 which is 19 more, so add those and you get 31.
Method B: The absolute value of the difference between the two numbers is positive 31. This is because the absolute value of -12 is 12 and the absolute value of 19 is 19. Just add.

6 0

3 years ago

15a + 8a + 2b + 13b + 25

guapka [62]

Answer:

23a + 15b + 25

Step-by-step explanation:

Collect the like terms=

15a + 8a = 23a

2b + 13b = 15b

4 0

3 years ago

Joe drives 20 mi-in 1/2 h. how Long Will it take him to derive 50 mi?

tiny-mole [99]

An hour and 15 minutes. Since Joe is driving 20 miles per 1/2 hour that means he is driving 40 miles every hour. We still have 10 miles left and since 20 divided by 2 is ten you would simply cut the time it takes him to drive 20 miles in half making 15 minutes. Then you add the time it takes to drive 40 miles and 10 miles and that's how you get an hour and 15 minutes. Hope this made sense!

7 0

3 years ago