ive done this so far 

       A       B        C 

lengths   =      3       4         5

areas      =      9     16       25

volumes  =    27     64     125

now i need help

The qestion is : Three solid shapes, A, B, and C are simalar.

The surface area of shape A is 9

The surface area of shape B is 16

The ratio of the Volume of the shape B to the volume of shape C is 27 : 125

work out the ratio of the height of shape A to the height of shape C.

give your answer in simplest form

The question is : There are only green pens and red pens in a box.There are more red pens than green pens.Sheila is going to take at random two pens.The probability that Sheila will take two pens of the same color is 17/35 work out the two different numbers of green pens that could be in the box.Your final line must be written inthe form, Threr could be ...or...green pens.In you working, let g stand for number of green pens. Write fractions in the form of a/b. Eg \(\frac{g}{2g+9}\) would be written as g/(2g+9)   

jimkey17 is right

​there can be 5+4+3+2+1=15 ways to do it and
you can flip them 2 times to get 15*4=60

Answer=60

I'll try to get through as many problems as I can!

3. This is going to be a bit tricky to explain without a diagram, but just draw one yourself on a piece of paper and follow along.

Let's start off with finding the cylinder's height.

First, draw the cylinder's space diagonal. The space diagonal of the cylinder is going to be the circle's diameter, which equals 10. 

Now draw the diameter of the cylinder's base. The diameter of the base, the space diagonal, and the height form a right triangle. Using the Pythagorean Theorem, we find that the height equals the square root of 10²-6² , which is 8.

Now we can figure out the volume of the cylinder: 3²\(\pi\)*8= 72\(\pi\)

Now we find the sphere's volume: \(\frac{4}{3}\pi\) * 5³ 

The space inside the sphere and outside the cylinder equals the sphere's volume - the cylinder's volume, which you should be able to calculate.

Thanks

wish i could have helped better... 

There are 5 choices for the president and 4 choices for the vice-president (since there has already been someone chosen for the president). 

Once you multiply 5 \(\times\) 4 = \(\boxed {20}\)

sorry i have watched these videos and still confused

my favorite method when i can't solve a problem is trial and error

maybe this link will help

thanks!

Ahh! That's clever. 

Case 1: A side of the square as a side of the triangle

There are 6 cases for this: One square can be on the outside of the triangle, and one that contains the triangle.

Case 2: A diagonal of the square as a side of the triangle

There are 3 cases for this, because there are three sides.

In all: 6 + 3 = 9 sides

thanks : 220 is the right answer

what do you mean? 

Oh, sorry! 

There are 10*11 horizontal wires and 10*11 vertical wires.

So 110 + 110 = 220 wires in all.

1/2 base * hieght

200 is wrong

I know