when operating a heater of 1500 watts for 3 hours per day the consumed energy and the total cost of 25 dirhams during a month (30 days) are ... and ...?

I. Consumed energy = 4.5Kwh

II. Total cost = 3375 Dirhams

Explanation:

Given the following data;

Power = 1500W

Time = 3 hours

To find the energy consumption;

Energy = power * time

Substituting into the equation, we have;

Energy consumption = 1500 * 3

Energy consumption = 4500 watt-hour = 4.5Kwh (1 Kilowatts is equal to 1000 watts)

To find the total cost;

Daily cost = Energy consumption * cost

Daily cost = 4.5 * 25

Daily cost = 112.5 Dirham

Therefore, monthly cost = 112.5 * 30

Monthly cost = 3375 Dirham.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2