In one study, the daily use of toilet flushes is 9.1 gallons of water per person per day.
in new york city, water costs $7.64 per 100 cubic feet of water. calculate the annual cost of toilet flushes for a family of four.
recall that 7.48 gallons = 1 cubic foot, and assume there are 365 days in a year.

$135.70

Step-by-step explanation:

First step is to calculate the daily consumption for this family of four.  We'll assume they're all in age to use and flush the toilet themselves (no babies).

So, one person flushes 9.1 gallons a day, a family of 4 would then flush 4 times that:

daily family flushes = 9.1 gal/person * 4 persons/family = 36.4 gal/family

That's for one day... now for a year...

yearly = 36.4 gal/day * 365 days/yr = 13 286 gal/year

Let's convert those gallons into cubic feet:

13 286 gal / 7.48 gal/ft³ = 1,776.2 ft³

Then we multiply the gallons by the price for 100 cubic feet and divide by 100:

1,776.2  ft³ * $7.64 /100 ft³ = $135.70

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl