6.0x10^4
6 X 104 miles ==========
6 x 104
decimal notation of 960000 = 900000 + 60000
7 x 10^3 x 6 x 10^4 = 4.2 x 10^8
6.0x10^4
It is: 6.0*10^4 in scientific notation and as a product of its prime factors in exponents it is 25*3*54 = 60,000
It is: 6 x 10^4
6 X 104 miles ==========
1 million = 1000000 60000 million = 60000 x 1 million = 60000 x 1000000 = 60000000000 Which I would write using scientific notation as 6 x 1010.
6 x 104
6400000 in scientific notation is 6.4 x 10^6
decimal notation of 960000 = 900000 + 60000
7 x 10^3 x 6 x 10^4 = 4.2 x 10^8
Ignore the scientific notation part for now. How do you add two negative numbers and get a negative number? That should be obvious: for instance, -7 + -3 = -10. You need to add a positive number greater than the absolute value of the negative number to make a positive number. Now, put in the idea of scientific notation. It really is just bookkeeping of decimal places so you don't have to keep writing them all out. It is still the same idea! If you doubt this, just expand it out and see how it works. For instance, -3 x 10 ^ 3 = -3000 Add in another negative number in scientific notation, say -6 x 10 ^ 4 = -60000. What do you get when you add them? -3000 + -60000 = -63000, or -6.3 x 10 ^4. If scientific notation ever confuses you, just expand it out and remember what it really is doing for you- it just collapses a bunch of digits you don't want to keep writing.
33% of 60000 = 33% * 60000 = 0.33 * 60000 = 19,800
12% of 60000= 12% * 60000= 0.12 * 60000= 7200