Thrity times the square of a non-zero number is equal to 8 times the number. what is the number. pls so confused

What is the domain of the function f(x)=^9x

Cody worked 42.5 hours per week in july. this is 12.25 hours more per week than he worked in june. how many hours did cody work per week in june?

The weight of an object in a particular scale is 175.2 lbs. the measured weight may vary from the actual weight by at most 0.1 lbs. what is the range of actual weights of the object