Identify which numbers are written correctly in scientific notation and which are not. 7.8 x 10^1
10.3 x 10^-8
3.5 x 8^4
3 x 10^6
2.12 x 10^-4
3.4 x 10^8
0.18 x 10^5
70 x 10^-9

70×10^-9

0.18×10^5

10.3×10^-8

Are not written correctly in scientific notation

Step-by-step explanation:they are not written correctly because a number whose absolute value is greater than or equal to 1 and 10 multiplied by an integer per of 10. So for short there either lower than 1 or higher than 10 and need to be between to be scientific notation. I hope this helped you

(w – 2.5)(w + 2.5)

(–4v – 9)(–4v + 9)

step-by-step explanation: