19.
Write the size of a grain of very fine sand, about 9.35 x 10^-2 cm, in standard form.
31.
The population of the US is expected to be 392 million people by 2050. Write this answer in scientific notation.
37.
Write 10^29 - 10^28 in scientific notation.
Thanks!
-Delilah :)
Sure! I'd be happy to help you with your questions.
19. To write the size of a grain of very fine sand, about 9.35 x 10^-2 cm, in standard form, we need to convert it to a decimal. In standard form, the number should be written as a non-zero digit multiplied by a power of 10. Here's how you can do it:
9.35 x 10^-2 cm = 0.0935 cm
So, the size of a grain of very fine sand is 0.0935 cm.
31. To write the population of the US, 392 million people, in scientific notation, we need to express it as a number between 1 and 10 multiplied by a power of 10. Here's how you can do it:
392 million = 3.92 x 10^8
So, the population of the US, 392 million people, can be written in scientific notation as 3.92 x 10^8.
37. To write the expression 10^29 - 10^28 in scientific notation, we need to perform the subtraction and express the result in scientific notation. Here's how you can do it:
10^29 - 10^28 = 10^29 - 1 x 10^28 = 10^29 - 10^29/10 = 0.9 x 10^29
So, 10^29 - 10^28 is equivalent to 0.9 x 10^29 in scientific notation.
I hope this helps! Let me know if you have any further questions.