Answer:
15 B
16 C
17 A
Step-by-step explanation:
15. option 2
16. option 3
17. option 1
15. (2.3*10^1)(7*10^6) = 161000000 = 1.61 * 10⁸
16. (1.1*10^-5)(3*10^-2) = 33/100000000 = 3.3 * 10⁻⁷
17. 7t⁴ * 7t⁴ = 49t⁸
