Multiply. Express each result in scientific notation.
1. (2 times 10^5)(3 times 10^2)
2.(6 times 10^-4)(1.2 times 10^-3)
2007-11-30 01:49:02 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
uuuhhhh...Not to be rude or anything...but instead of saying comments about only...could you actually solve so I can see if I was right??
This was what I put for number 1: 6 times 10^7
2. 7.2 times 10^-7
2007-11-30 01:55:45 · update #1
Ok thankies first answering person!!!!
2007-11-30 01:57:24 · update #2
Question 1
6 x 10^7
Question 2
7.2 x 10^(-7)
2007-11-30 07:50:23 · answer #1 · answered by Como 7 · 4⤊ 1⤋
The key to remember is that exponential powers add during multiplication.
Therefore, 10^5 * 10^2 = 10^7 (adding 5 and 2)
Likewise, 10^ -4 * 10^ -3 = 10 ^ -7 (adding -4 and -3)
Now you are simply left with multiplying 2*3 = 6
and 6 * 1.2 = 7.2
Therefore, here is what you get
(2 times10^5) (3 times 10^2) = 6 * 10^7
and (6 times 10 ^ -4) (1.2 times 10 ^ -3) = 7.2 * 10 ^ -7
2007-11-30 10:03:07 · answer #2 · answered by Druzhok 3 · 1⤊ 1⤋
1. (2*10^5)(3 * 10^2)= 2 * 10^5 * 3 * 10^2)=
2 * 3 * 10^2 * 10^5 =
6 * 10^(5+2) =
6 * 10^7
2.(6 x 10^-4)(1.2 x10^-3)=
6 * 10^-4*1.2 *10^-3 =
6 * 1.2 * 10^-4 * 10^-3=
7.2 * 10^(-4-3)=
7.2 * 10^-7
Which mean you are absolutely CORRECT!
2007-11-30 09:51:30 · answer #3 · answered by Orfeas 3 · 1⤊ 1⤋