Math regents questions

I had a few doubts on some questions on the regets today...

1- Bob left his hot coffe on the kitchen table. Which graph shows the relation of temeprature and time on the coffe...



The top or bottom one?

2-Bob has to pick the number 2 cube out of 8 cubes labeled 1 to 8 from a hat.

What is the chance of him picking the number 2 out of the 9 cubes twice in a row?

1 i would say the second chart because once it hits room temp the speed of the cooling would decrease and i don't think it would hit 0 in under 6 min unless our friend is in Antarctica.

preid1220 wrote:1 i would say the second chart because once it hits room temp the speed of the cooling would decrease and i don't think it would hit 0 in under 6 min unless our friend is in Antarctica.

BUt the second one doesnt reach 0 at all...it stops at 62 and goes straight

so 62 would be the room temp, it would no longer be able to drop any more

yeah it's called room temperature ...

don't feel like doin probability ...

Room temperature is 32...not 62.

Also I don't think they would mix scince facts with math...I made it go all the way to 0...

Omg... , I think I did get the coffee question wrong ...it would be frozen at 0...this has more to do with science than math but ...

Anyone know the second?

I put:

1
--
64

you mean twice out of eight cubes right? I think it is (1/ times (1/ so 1/64.

and I agree that the answer to number one is the bottom one...too bad Ahmed...was it a Math A regent?

Yay!

ANd it is "Integregated ALgebra" they stopped giving Math A and Math B when I went to school.

oh, so did you took it early or something? And my year was the last one with Math A and B I guess

No..I took it again -___-

And yes it is.

New Question:




Which is a function?

that's the easiest question: number 1

why did you take it again?

You serious?

-______-

But I thought it has to pass the vertical line test...

exactly, the function, at the top, only touches the vertical line once so it passes the vertical line test!

Exactly, so doesn't that make the top one the function and not the bottom?

yep, it does, ny mistake, I wrote tthe wrong number, sorry for scaring you Ahmed

Alhamd Allah

So far I know I lost 2 points off...which is great

I need to (not really need to, but want to) take it again because I didn't get the mastery grade last time which is an 85 ...I got an 84

Ahmed IV wrote:No..I took it again -___-

And yes it is.

New Question:




Which is a function?

first one ... second one is undefined ...

go get a 99 Ahmed we know you can do it (don't get 100 that is an evil number)

I need help with this q btw:

an aluminum sphere contains 8.55 * 10^22 aluminum atoms ... what is the radius of the sphere in cm? The density of aluminum is 2.70 g/cm^3

Well I know I have a 98 so far...I lost 2 points because of the coffee question...
Hassan should be able to help Sayf.

lol I don't think Hassan can do that problem ... what otehr q's are u uncertain of?

Well....

This took me time to figure out...



Bob wants to put a lights line all around this window. How long does the line have to be?

The window is amde up of a rectangle and semi-circle on top of it...its all one piece.

you mean the perimeter of the shape?

If so it's (11+13+13) + (1/2*2π r)
the radius would be half of 11 ... since 11 is the diameter of the circle ... so your final answer should be:

54.27

Unless the question is about something totally different

Nope, that's what I did.

Also FYI, there was no point in findig out the radius since "2r" is the same as "d"-which stands for diameter.