4x^5 is a term of degree 5, and its coefficient is 4
Answer:
Option C. 
Step-by-step explanation:
we have

Solve for x
That means ---> isolate the variable x
Multiply by 8 both sides to remove the fractions

Multiply by -1 both sides
Remember that
When you multiply or divide both sides of an inequality by a negative number, you must reverse the inequality symbol

Divide by 5 both sides

X^4+81=0 sorry if I got it wrong I apologize
Yes because 1.2 is the same as 1.20 it's just that you removed the 0