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Kobotan [32]
3 years ago
14

What is a counter example to the conjecture: all balls are spheres?

Mathematics
1 answer:
Marizza181 [45]3 years ago
6 0
All balls are circles
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Multiple Choice, could somebody help me with this?
ololo11 [35]

Answer:

option 5 and option 6

Step-by-step explanation:

option 5.

dilate with a scale factor of 1/2.

This is because we have to take as a reference the base circumference of the point p as the problem says, so we see the radius of that circumference is twice that of the other, so to get there it must be multiplied by 1/2

option 6.

reflect in the y-axis.

we can see that the distance of the 2 points to the y axis is the same, which means that it is reflected on the y axis

3 0
3 years ago
At a speed of 22 revolutions per minute, how long will it take a wheel of radius 10, rolling on its edge, to travel 10 feet? (As
Marina86 [1]
<u><em>I don't know if this is 100% correct...but i think this is how you would solve this problem!!!</em></u><u><em /></u><em />

OOOKKKKK.........

We all know that a well is circular. So, First, lets find out the circumference of the wheel.

Given :
radius = 10 feet
π = 22 / 7
We know,
Circumference = 2πr
                      = 2 × (22 / 7) × 10
                      = 62.9 ft.

Now,
One revolution means the wheel has covered a distance equal to its circumference. So, 22 revolutions per minute means that the wheel is covering 22 times its circumference in 1 minute. So, Lets convert the revolution to feet.

Given,
The wheel is travelling at 22 revolutions per minute.
                                 =  22 * Circumference per minute
                                 =  22 * 62.9 ft. per minute
                                 = 1383.8 ft. per minute
Now, that we know how much feet it is travelling in 1 minute, we can easily find how much it takes it to travel 10 feet. 

Using unitary method,
The wheel travels 1383.8 ft. in 1 minute
The wheel travels 1383.8 ft. in 60 seconds.
The wheel travels 1 ft. in (60 /  1383.8) seconds.
The wheel travels 10 ft. in (60 /  1383.8) * 10 seconds.
                                      = 0.4 seconds

So, the answer is 0.4 seconds. Of course...the answer is rounded!!


5 0
2 years ago
Find the slope for (3,1)and (4,3)
Vaselesa [24]
Y2-y1 / x2-x1

so, 3-1 =2 and 4-3=1
2/1 is 2
3 0
2 years ago
Read 2 more answers
Find the slope of a line that passes through points (-3, 5) and (1, 2)
Mashcka [7]

Answer:

the slope is -3/4

Step-by-step explanation:

this is because you need to do rise/run not run/rise,  you set it up as a table

<u>x l y</u>       Then, you would just find the difference between the two x coordinates and the two y coordinates, and find whether they increase or decrease

-3,5                         you can see that from -3 to postive 1 there

 1,2                         is an increase of 4.  you can also see that from 5 to 2 there is a decrease of 3.  The y and x point have to flop places to become rise/run and it shows that the slope is -3/4 :) i hope this helps

3 0
2 years ago
What’s the answer to this math problem
LuckyWell [14K]
Y/x^2

You have to subtract or add exponents
8 0
3 years ago
Read 2 more answers
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