Simplify. Express your answer using positive exponents.
227^8 / 227^6
(1 point)
227^8 / 227^6 = ?
227^8 / 227^6 = 227^(8-6) = 227^2
The Bohr radius of a hydrogen atom is 0.0000000000529. Express theBohr radius of a hydrogen atom in scientific notation. (1 point)
5.29 * 10 ^ 8
5.29 * 10 ^ -13
5.29 * 10 ^ -11
5.29 * 10 ^ 11
The correct answer is 5.29 * 10^-11.
The average weight of a blue whale is 4 x 105 pounds. The average weight of an elephant is 1 x 104 pounds. Approximately how many times heavier is a blue whale than an elephant in pounds?
4 times heavier.
2 times heavier.
40 times heavier.
To determine how many times heavier a blue whale is compared to an elephant, we can divide the weight of the blue whale by the weight of the elephant:
(4 x 10^5) / (1 x 10^4) = 4 x 10^(5-4) = 4 x 10^1 = 40
Therefore, a blue whale is approximately 40 times heavier than an elephant.
What is the sum of 7 * 10 ^ -8 and 6 * 10 ^ -8 ?
13 * 10 ^ 8
1.3 * 10 ^ -7
13 * 10 ^ -16
To add these numbers, we need to make sure they have the same exponent. Both numbers are already in scientific notation with a base of 10, so we can add them directly:
(7 * 10^-8) + (6 * 10^-8) = 13 * 10^-8
Therefore, the sum of 7 * 10^-8 and 6 * 10^-8 is 13 * 10^-8.
thats option isnt in the answers
I apologize for the confusion. Let's simplify the sum of 7 * 10^(-8) and 6 * 10^(-8):
7 * 10^(-8) + 6 * 10^(-8) = 13 * 10^(-8)
Therefore, the correct answer is 13 * 10^(-8).