An electrical water heater (for room heating) held at 140of is kept in a 70of room. when purchased, its insulation is equivalent to r-5. an owner puts a 25-ft2 blanket on the water heater, raising its total r value to 15. assuming 100 percent conversion of electricity into heated water, how much energy (kwhr) will be saved each year? if the electricity costs 8.0 cents/kwhr, how much money will be saved in energy each year?

In guinea pigs, assume black coat is completely dominant over white. to determine whether an unknown black guinea pig is pure or hybrid black, it should be crossed with bb, bb, bb

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

Atank holds 1000 gallons of water, which drains from the bottom of the tank in half an hour. the values in the table show the volume v of water remaining in the tank (in gallons) after t minutes.t(min) 5 10 15 20 25 30v(gal) 694 444 250 111 28 0(a) if p is the point (15, 250) on the graph of v, find the slopes of the secant lines pq when q is the point on the graph with t = 5, 10, 20, 25, and 30.(b) estimate the slope of the tangent line at p by averaging the slopes of two secant lines.(c) use a graph of the function to estimate the slope of the tangent line at p. (this slope represents the rate at which the water is flowing from the tank after 15 minutes.)show all steps.