Agas company has the following rate schedule for natural gas usage in single-family residences:
monthly service charge $8.80
per therm service charge
1st 25 therms $0.6686/therm
over 25 therms $0.85870/therm
construct a function that gives the monthly charge c for x therms of gas.

So if  X is greater than 25, you would need to subtract 25 from X and then multiply it by the rate. After that, add 25.515. So your function should look something like this:

X > 25, 0.85870 * (X - 25) + 25.515

So that's  assuming the first 25 are priced at the 0.6686 rate. So the ones after 25 are then priced at the 0.85870 rate.

answer:

(a) and (c)

step-by-step explanation:

in δabc, ab=1, ac=bc=2 and δdef, de=3, df=7 and ef=6

now, (a)

hence the given triangles are not similar.

(b)

=

hence,the triangles are similar.

(c)

hence, the triangles are not similar.

(d)

=

hence, triangles are similar.

hence, option a and c shows that triangles are not similar.