Compare the energy consumption of two commonly used items in the household. calculate the energy used by a 1.40 kw toaster oven, wtoaster , which is used for 6.00 minutes, and then calculate the amount of energy that an 11.0 w compact fluorescent light (cfl) bulb, wlight , uses when left on for 9.00 hours .

Explanation:

It is given that,

Power consumed by toaster oven,

Time taken, t = 6 minutes = 0.1 hour

Energy used by toaster,

Similarly,

Power consumed by toaster oven,

Time taken, t = 9 minutes = 0.15 hour

Energy used by toaster,

Hence, this is the required solution.

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.