To write 67.5 billion in scientific notation, we first need to move the decimal point to the right so that there is only one non-zero digit to the left of the decimal point. In this case, we would move the decimal point 10 places to the right, resulting in 6.75. Next, we express this number as a product of a number between 1 and 10 and a power of 10. Therefore, 67.5 billion in scientific notation is 6.75 x 10^10.
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999 -675 = 324
To find a common denominator for 25, 27, and 45, we need to determine the least common multiple (LCM) of these numbers. The prime factorization of 25 is 5^2, 27 is 3^3, and 45 is 3^2 * 5. The LCM is the product of the highest power of each prime factor that appears in any of the numbers, which in this case is 3^3 * 5^2 = 225. Therefore, 225 is the common denominator for 25, 27, and 45.
To divide by a fraction, multiply by its reciprocal. In this instance, 450 / 2/3 is equal to 450 x 3/2 = 675
factors of 2025 - 1, 3, 5, 9, 25, 81, 225, 405, 675, 2025, the facotrs 9 and 81 addto 90
1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 135, 225, 243, 405, 675, 1215, 2025, 6075 3 and 5 are prime.