## anonymous one year ago Which number is not in scientific notation? 1.1 ⋅ 10213 7.8 ⋅ 108 3.02 ⋅ 10−10 35 ⋅ 104

1. anonymous

2. Michele_Laino

hint: a number written using scientific notation has only one unit figure, for example, the subsequent number is written using scientific notation: $\large 6.62 \cdot {10^{ - 27}}$

3. anonymous

okay

4. Michele_Laino

so, what is the right option?

5. anonymous

idk im confused

6. Michele_Laino

int: the integer portion of a number, which is written using the scientific notion, has only one figure, which is the unit figure, now, the integer part of 35, for last number, is composed by two figures

7. Michele_Laino

hint*

8. Michele_Laino

1.1 is an integer number with 1 integer figure 7.8 is an integer number with 1 integer figure 3.02 is an integer number with 1 integer figure 35 is an integer number with 2 figures

9. anonymous

sorry im back

10. anonymous

i still dont understand this

11. anonymous

wait so the one with 2 figures is not scientific notation

12. Michele_Laino

a number is written in scientific notation, when it is like this: $\Large 6.62 \cdot {10^{ - 27}}$ now, among the numbers which you have provided, what is the one which is not written in that form?

13. anonymous

D the last one

14. Michele_Laino

a number written using scientific notation has only one figure at the left of decimal point

15. Michele_Laino

so, correct!

16. anonymous

gosh pre- algebra is difficut to me.

17. anonymous

well kind of

18. Michele_Laino

for example, the subsequent number: $\Large 258 \cdot {10^{ - 28}}$ is written using scientific notation? @Marc1313