Please help me with this super easy fifth grade math problem. Make sure to follow the directions the question/file gives you. Please help me!!! I gave up 20 points for this. Help.

What are the domain and range of the function? f(x) = -4 (sqrt)x

Which function is increasing? o a. f(x)=(1/15)* o b. f(x)= (0.5)* o c. f(x)=(1/5)* o d. f(x) = 5*

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?