Step-by-step explanation:
oh, come on, just multiplication.
7.5×10⁴ years is 7.5×10000 =75000 years.
0.005 inches per year for 75000 years means
0.005 × 75000 = 5 × 75 = 375 inches.
Answer:

Step-by-step explanation:
3a²*2a³ = (2*3)(a² *a³)= 
Answer:
.
Step-by-step explanation: