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write .921 in scientific notation

.921 x 10-6

.921 x 105

9.21 x 106

9.21 x 10-6

write .6768 in scientific notation

6.768 x 10-10

6.768 x 10-11

6768 x 1010

6768 x 10-10

write 378,675,100,000 in scientific notation

3.786751 x 1011

3.786751 x 1010

3.786751 x 10-11

3.786751 x 10-10

write 375,000 in scientific notation

37.5 x 10-5

3.75 x 105

37.5 x 104

37.5 x 10-4