Convert 8.87 x 10 to an ordinary number.

[fringe bloom]

can someone help with this question?

Convert 8.87 x 10 to an ordinary number.

[gray hinge]

is it just 10, no 10 to the power of something?

if so, literally just do 10 times by 8.87

[fringe bloom]

dw all good but this quetion is confusing

[cosmic stream]

1.4x10^6

[fringe bloom]

thanks

nope

[cosmic stream]

blinks

I swear that’s right

[gray hinge]

you do 7 * 2 * 10^5 * 10^5
14 * 10^10
1.4 * 10^11

you have to add the powers

[cosmic stream]

ohhh

it’s multiply

wait no I multiplied them

idk what I did

[gray hinge]

when you multiply powers you add the indices

a^b * a^c = a^(b+c)

[cosmic stream]

yeah I think I just got confused with multiplying and adding

[fringe bloom]

thankssss

[cosmic stream]

because I was adding standard form numbers for homework the other day

[fringe bloom]

is this correct??

[gray hinge]

but 10^5 + 10^5 ≠ 10^6

[fringe bloom]

is my question correct?

[gray hinge]

nope

you are dividing not multiplying

and even if it was multiplying, it would be 2.94 * 10^16

[fringe bloom]

soo what is it?

[gray hinge]

6 * 10^2

you do:
4.2 / 7 = 0.6
10^9 / 10^6 = 10^3

so it’s 0.6 * 10^3
we change this to make 0.6 into a number between 1 and 10:
6 * 10^2

[fringe bloom]

thx

[gray hinge]

we multiply the 0.6 by 10 and, to keep the value the same, we divide 10^3 by 10

[fringe bloom]

@gray hinge I’m stuck on q13

I keep getting 0.047

[gray hinge]

5 * 10^-2 = 5 * 1/10^2 = 5 * 1/100 = 1/20

3 * 10^-3 = 3 * 1/10^3 = 3 * 1/1000 = 3/1000

1/20 - 3/1000 = 50/1000 - 3/1000 = 47/1000 = 0.047

0.047 = 4.7 * 10^-2

[fringe bloom]

Oh-

Ops

Thanks

[gray hinge]

np

when you convert a decimal to standard form, count the total number of 0’s then do the number after it in standard form times by 10 to minus that number of zeroes

for example

0.00034

•there’s 4 zeroes

•the number after the zeroes in standard form is 3.4