an electric heater draws 1100 W of power. Electricity costs eight cents per kW•h. How much does it cost to operate the heater 3h a day for 30 days?

Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?