i really need !
(science) (15 pts)

1. my amplifier uses a filament that requires a maximum of 5 volts at a current of 15 amperes.
calculate the resistance of the tube. (round to no more than two numbers to the right of the decimal)

2. how many ohms of resistance are present in a light bulb that draws 2 amperes at 120 volts?

3. a 250 watt radio will draw how many amps when operating on 240 volts? (round to no more than two numbers to the right of the decimal)

Ascientist studied a population of workers to determine whether verbal praise and/or tangible rewards affect employee productivity. in the study, some workers were offered verbal praise, some were offered tangible rewards (gift cards, presents, and some were offered neither. the productivity of each participant was measured throughout the study by recording the number of daily tasks completed by each employee. which inference might the scientists make based on the given information? a.) the number of daily tasks completed by each employee may influence the dependent variable, which is whether the employee receives verbal praise, tangible rewards, or neither. b.) verbal praise and/or tangible rewards may influence the independent variable, which is the number of daily tasks completed by each employee. c.) verbal praise and/or tangible rewards may influence the dependent variable, which is the number of daily tasks completed by each employee. d.) the dependent variables, which are verbal praise and tangible rewards, may influence the number of daily tasks completed by each employee.