(1.2 x 10^13)(-3.3 x 10^-4) / 7.2 x 10^15
The question says Compute and give my answer in scientific notation.
The answer is -7.64x10^6
But i get -5.5x10^-5 ?
2007-12-06 20:26:39 · 6 answers · asked by Mzee 3 in Science & Mathematics ➔ Mathematics
Sorry i would like to correct the book's answer, it's -5.5x10^-7
2007-12-06 20:33:19 · update #1
And i'm getting -5.5x10^-5
2007-12-06 20:34:27 · update #2
1.2 x 10^13 x -3.3 x 10 ^-4 = - 3.96 x 10 ^9
Now let us divide that by the other number
-3.96 x 10^9 / 7.2 x 10^15 = -0.55 x 10^-6
To express it as an exponent, we need to write 0.55 as 5.5 x 10^-1 and so we get the final answer as
-5.5 x 10^-7
The answer given is wrong.
2007-12-06 20:34:23 · answer #1 · answered by Swamy 7 · 1⤊ 1⤋
(1.2 x 10^13)(-3.3 x 10^-4) / 7.2 x 10^15
=-(1.2 * 3.3 /7.2) * 10^(13-4-15)
=-0.55 * 10^(-6) = -5.5 * 10 ^( -7)
2007-12-06 20:39:54 · answer #2 · answered by mbdwy 5 · 0⤊ 1⤋
Answer is x=12. 9x-4x+12=72 9x-4x=72-12 5x=60 x=60/5
2016-05-21 23:37:08 · answer #3 · answered by ? 3 · 0⤊ 0⤋
1.2(-3.3)/7.2=-0.55
10^13x10^4/10^15=10-6
combine
-0.55x10^-6=-5.5x10^-7
2007-12-06 20:38:47 · answer #4 · answered by someone else 7 · 0⤊ 0⤋
I don't know but I checked on my calculator 3 times and I got -0.55x10^-6 :(
2007-12-06 20:34:02 · answer #5 · answered by coucou_bambie 2 · 0⤊ 1⤋
-5.5x10^-6 is my answer
2007-12-06 20:37:38 · answer #6 · answered by sven 3 · 0⤊ 1⤋