Exponents and Scientific Notation

zee-f · 2011-07-06 04:48:45

yeah am sorry for that ill try to post the question correct

zee-f · 2011-07-06 04:50:07

for 11 i got c

11. How many centimeters are in two kilometers? Give your answer in scientific notation.
A 2 x 10^2
B 1 x 10^5
C 2 x 10^5
D 2 x 10^3
E 1 x 10^2
F 3 x 10^2

Bob · 2011-07-06 05:11:48

Excellent. That's correct!

Bob

zee-f · 2011-07-06 07:16:38

hey

for #12 i got b
for #13-i got c

12. How many grams are in 4,247 mg? Give your answer in standard notation.
A 42.47
B 4.247
C 42
D 4247
E 424.7
F 424

13. How many microliters are in a two liter bottle of soda? Write your answer in scientific notation.
A 1 x 10^3
B 1 x 10^6
C 2 x 10^3
D 2 x 10^5
E 2 x 10^6
F 3 x 10^4

Bob · 2011-07-06 07:20:38

hi zee-f

b is correct for 12.

In 13 I think you got mixed up between milli-liter (=1/1000 liter) and micro-liter (=1/1000 000 liter).

Try again?

Bob

zee-f · 2011-07-06 07:29:25

so am ganna have 2/2000000

zee-f · 2011-07-06 07:30:52

so my answer would be e?

Bob · 2011-07-06 07:31:08

Er, what do you mean 2/2000000.

I'd be happy with one of the letters.

Which is the correct choice then?

Bob

zee-f · 2011-07-06 07:36:46

the correct choice i think is E

Bob · 2011-07-06 07:41:10

and I think so too.

WELL DONE!

Bob

sorry I missed your earlier post. I think we both pressed submit at the same time.

Last edited by Bob (2011-07-06 07:42:27)

zee-f · 2011-07-06 07:50:23

no its ok thanx alot for the help

zee-f · 2011-07-06 07:52:07

am still working on the rest

Bob · 2011-07-06 07:53:07

I'll check back from time to time to see.

Look to see if I'm still Online.

Bob

Last edited by Bob (2011-07-06 07:53:28)

zee-f · 2011-07-06 07:56:47

like for 14 i posted a picture earlier am confused how to answer it i know that 3.25 kilograms =3250000 milligrams

zee-f · 2011-07-06 07:57:49

14. Examine the following solution to a conversion problem. Do you see a mistake? If so, identify the location of the first mistake and explain why it is incorrect.

A The conversion is not possible.

B The first problem occurs in column (1). The problem should begin with mg.

C The first problem occurs in column (2). 1 kg is not equal to 1000 g, so that should not be used as the conversion factor.

D The first problem occurs in column (2). The conversion factor is upside down (grams should be on top, and kg should be on bottom).

E The first problem occurs in column (4). The multiplication and division was performed incorrectly.
FNo mistakes

Bob · 2011-07-06 08:14:25

hi zee-f

Yes, I've seen the picture.

And your conversion in post #64 is correct.

And that's not what the picture says, so there's a mistake somewhere. Once a mistake has occurred what follows may also be wrong (because of a double error or because the first error messes up the rest) so you only have to find the first error.

And say where it occurs by giving the number (1) or (2) or .....

What do you think?

Are you sure you have the possible answers copied correctly because no line describes exactly what has gone wrong. Answer D has column (2) again. Should this be a (3) ?

Bob

Last edited by Bob (2011-07-06 08:23:56)

zee-f · 2011-07-06 08:23:17

so i think its C thats my answer am not sure tho :?

Bob · 2011-07-06 08:25:25

C ?

But 1000g is 1Kg! Kilo means 1000 so Kilogram = 1000 grams

Bob

zee-f · 2011-07-06 08:26:48

they multiply incorrect so its E

Bob · 2011-07-06 08:31:01

That's what I think.

I've not seen conversions done in a table like this, but I think my diagram below shows what is intended.

And that means it should be multiply then multiply again.

Bob

zee-f · 2011-07-06 08:35:12

yup yup yup

zee-f · 2011-07-06 08:36:54

for 15 its correct because 127.2 mm=12.72 centimeters

Bob · 2011-07-06 08:42:07

Well yes, I agree, but I still find this way of converting puzzling.

Why would you change to cm via meters.

Ho hum, let's push on. Maybe the next one will make more sense.

Bob

zee-f · 2011-07-06 09:36:05

am confused on the sign in 16 what dose it stand for ???

Bob · 2011-07-06 09:58:10

Do you mean this one:

That's a Greek letter 'mu'. It's used to stand for 'micro' = 1/1000 000

so

Bob

Last edited by Bob (2011-07-06 09:58:40)

Math Is Fun Forum

#51 2011-07-06 04:48:45

Re: Exponents and Scientific Notation

#52 2011-07-06 04:50:07

Re: Exponents and Scientific Notation

#53 2011-07-06 05:11:48

Re: Exponents and Scientific Notation

#54 2011-07-06 07:16:38

Re: Exponents and Scientific Notation

#55 2011-07-06 07:20:38

Re: Exponents and Scientific Notation

#56 2011-07-06 07:29:25

Re: Exponents and Scientific Notation

#57 2011-07-06 07:30:52

Re: Exponents and Scientific Notation

#58 2011-07-06 07:31:08

Re: Exponents and Scientific Notation

#59 2011-07-06 07:36:46

Re: Exponents and Scientific Notation

#60 2011-07-06 07:41:10

Re: Exponents and Scientific Notation

#61 2011-07-06 07:50:23

Re: Exponents and Scientific Notation

#62 2011-07-06 07:52:07

Re: Exponents and Scientific Notation

#63 2011-07-06 07:53:07

Re: Exponents and Scientific Notation

#64 2011-07-06 07:56:47

Re: Exponents and Scientific Notation

#65 2011-07-06 07:57:49

Re: Exponents and Scientific Notation

#66 2011-07-06 08:14:25

Re: Exponents and Scientific Notation

#67 2011-07-06 08:23:17

Re: Exponents and Scientific Notation

#68 2011-07-06 08:25:25

Re: Exponents and Scientific Notation

#69 2011-07-06 08:26:48

Re: Exponents and Scientific Notation

#70 2011-07-06 08:31:01

Re: Exponents and Scientific Notation

#71 2011-07-06 08:35:12

Re: Exponents and Scientific Notation

#72 2011-07-06 08:36:54

Re: Exponents and Scientific Notation

#73 2011-07-06 08:42:07

Re: Exponents and Scientific Notation

#74 2011-07-06 09:36:05

Re: Exponents and Scientific Notation

#75 2011-07-06 09:58:10

Re: Exponents and Scientific Notation

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