IDNLearn.com offers a seamless experience for finding and sharing knowledge. Discover prompt and accurate answers from our experts, ensuring you get the information you need quickly.

Which number is not in scientific notation? (5 points)

9 ⋅ 1019
7.8 ⋅ 106
1.45 ⋅ 10−7
0.33 ⋅ 10−15