You insulate your medium-sized attic with insulation with R=10. Which of the following sets of estimates is most reasonable?

A. The attic is 150 sq ft, the temperature difference on average is 5 degrees C, and electricity costs 1 cent per kWh.

B. The attic is 15,000 sq ft, the temperature difference on average is 10 degrees F, and electricity costs $10 per kWh.

C. The attic is 150 sq ft, the temperature difference on average is 5 degrees F, and electricity costs $1 per kWh.

D. The attic is 1500 sq ft, the temperature difference on average is 50 degrees F, and electricity costs 1 cent per kWh.

E. The attic is 1500 sq ft, the temperature difference on average is 10 degrees F, and electricity costs 10 cents per kWh.

when the use of electricity burdens the fuse and miniarure circuit beakers and there is a possibility of a fuse then they automatically cut off the electricity supply to your homes and after you fix the problem u jzt switch it on and it continues the supply of electricity to ur homes

i'm on my way to history not a mistory.

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.