Question

Madelyn broke a cell sample into 8 batches, each weighing 6.4 x 10-7grams. Howmuch did the original sample weigh? Use scientific notation to express your answer.

Answer 1

To find out the original sample weight, multiply 6.4 x 10-7 grams by 8

so

8*(6.4 x 10-7)=51.2 x 10-7 grams

Convert to scientific notation

51.2 x 10-7=5.12 x 10-6 grams

therefore

the answer is 5.12 x 10-6 grams