Putting in scientific notation (3000)(20000)
6*10^7
Solving
(3*10^5)(7*10^3)
21*10^9
Is this right, please help
the first one is correct
the second one is not right because you can only have a digit in the ones section
so it should be 2.1 x 10^9
first one is right,
second one should have been 2.1 * 10^9
perhaps it was just a typo.
Yes, you are correct!
To multiply numbers in scientific notation, you need to multiply their coefficients and add their exponents.
Let's solve the first problem: (3000)(20000).
Step 1: Multiply the coefficients: 3 * 2 = 6.
Step 2: Add the exponents: 10^3 * 10^4 = 10^(3+4) = 10^7.
So, (3000)(20000) = 6 * 10^7.
Now, let's solve the second problem: (3*10^5)(7*10^3).
Step 1: Multiply the coefficients: 3 * 7 = 21.
Step 2: Add the exponents: 10^5 * 10^3 = 10^(5+3) = 10^8.
So, (3*10^5)(7*10^3) = 21 * 10^8.
Therefore, your answer is correct! It is (3*10^5)(7*10^3) = 21 * 10^8.