Answer:
The GCF of 3x^4, 15x^3 and 21x is 3x^2
Step-by-step explanation:
3x^2(x^2), 3x^2(5x) , 3x^2(7)
3
3*4=12
15*3=45
21x= 7*3*x
No
The scientific notation of 0.91 is: 9.1 × 10-1
