ANSWER



EXPLANATION.
The given binomial is

One property about all the terms in this binomial expansion is that:
The degree of each term is 10.

degree=4+6=10

degree=3+7=10

degree=6+4=10

degree=5+0=5
All the terms with degree 10 are the correct options
In a - 3 = 15, the value of a HAS to be 18.
In a - 3 is greater than or equal to 15, the value of a is any value that is 18 or higher.
I think u have to Multiply the 100 and 0.30 and that would be 30
No 7x3/5 is 4.2 and 4x1/5 is 0.8
Isn't that standard form sorry for this bad answer