Keegan and Jeff did some research and found that there are approximately 7,492,000,000,000,000,000 grains of sand on Earth. Jeff says that it is about 7 × 10(15) grains of sand. Keegan says that this is about 7 × 10(18) grains of sand. A. How might Jeff have determined his estimate? How might Keegan have determined his estimate?

Using the latest geological studies, they calculate the total volume of sand on Earth. Scientists estimate that Earth contains 7.5 sextillion sand grains. ... Astronomers estimate there exist roughly 10,000 stars for each grain of sand on Earth. That's a lot of stars.

Step-by-step explanation:

i looked it up

hey seth! : )

i’m not 100% sure, but i think it’s b

hope this ya : p

miss u!

- nicole