Question

i typed in a problem and i got this answer can somebody explain this to me PLEASE ??
2.56e+22

Answer 1

i believe i can help you, but i need to know the original problem

Answer 2

(6.25*10^-12)^-2

Answer 3

so this is 6.25 times 10 raised to the -12 power inside the parentheses

Answer 4

then raise that result to the -2

Answer 5

yes

Answer 6

ok. so how did you proceed?

Answer 7

um

Answer 8

by proceed you mean start the problem?

Answer 9

yes

Answer 10

ok wow i feel stupid ok

Answer 11

ok first you distribute the -2

Answer 12

ok.

Answer 13

i am so sorry some ones at my door one minute please

Answer 14

no problem

Answer 15

ok they left im so sorry

Answer 16

not at all

Answer 17

please, dont feel uncomfortable. you are fine

Answer 18

which will be 6.25^-2 times 10^24

Answer 19

sure. that looks good so far

Answer 20

0.0256 times....

Answer 21

ok it says 1e+24

Answer 22

when i tried to type in 10^24

Answer 23

1e2+24 means 10^24

Answer 24

so e2 is the same as ^?

Answer 25

ooops. 1e+24=10^24

Answer 26

ok so e is ^

Answer 27

it is simply notation

Answer 28

yes

Answer 29

raised to the exponent of 24

Answer 30

ok well thats less confusing

Answer 31

it seems like your math skills and order of operations are in order. this was just a notation issue.

Answer 32

ok its just im taking algebra 1 as a highschool credit and its the 2nd week and its sooooo confusing

Answer 33

now the 6.25 raised to the -2 gave you the .0256

Answer 34

on calculators or in programming languages e is used to mean 10 to the exponent
so
2e3 means 2 times 10^3 or 2000
and
2e-3 means 2 times 10^-3 or 2 times 1/1000 or 1/500

Answer 35

thanks phi

Answer 36

thank you !

Answer 37

i don t think we are quite through yet

Answer 38

i was talking to phi

Answer 39

so back to the problem

Answer 40

to get the answer, there is a final step

Answer 41

.0256=2.56x10^-2

Answer 42

so thats it?

Answer 43

and we are multiplying this times 10^24

Answer 44

it says to simplify and write it in scientific notation

Answer 45

so now we add the exponents of 10

Answer 46

by the laws of exponents, when you multiply two exponents with the same base, in this case 10, you add the exponents

Answer 47

add them with what theres no more exponents left

Answer 48

remember that i wrote for you .0256=2.56x10^-2;

Answer 49

now multiply that time 1x10^24

Answer 50

10^24

Answer 51

yes, 1x10^24=10^24

Answer 52

i wrote it that way so that you can see that the 2.56 has 1 to multiply by

Answer 53

sooo its 2.56x10^24

Answer 54

so the product looks like this; 1x2.56x10^24x10^-2

Answer 55

not quite, you have to account for the 10^-2

Answer 56

?!?

Answer 57

look at the above product.. dont give up... you are nearly there

Answer 58

iam COMPLETLY lost

Answer 59

add the exponents of the 10's

Answer 60

22

Answer 61

ok.

Answer 62

.0256=2.56x10^-2 and 1x10^24=10^24; then we take their product;

Answer 63

(2.56x10^-2)(1x10^24); now use the commutative property to rearrange the product like so; (2.56x1)(10^-2x10^24). Does this make sense to you?

Answer 64

ok my moms home now she can can help me i just cant do this on the computer it to confusing

Answer 65

i"am sooooo sorry

Answer 66

thank you for your time and help i just have to see it worked out on paper

Answer 67

take care.

Answer 68

maybe this video and the next one after it will help
http://www.khanacademy.org/math/algebra/exponents-radicals/v/scientific-notation-i

Answer 69

and this one (bring lots of popcorn)
http://www.khanacademy.org/math/algebra/exponents-radicals/v/scientific-notation-examples