I have a 7.875 kilowatt system and I get paid .25 cents per Watt. How much did I earn?

I earned $19.70

Step-by-step explanation:

Given that:

I have 7.875 kilowatt

Convert kilowatt to watt

1 kilowatt = 1000 watt

∴ 7.875 x 1000 watt ==> 7875 watt

I get paid 0.25 cents for every watt.

∵ earning = watt system x amount paid

                = 7875 x 0.25

                = 1,968.75 cent

converting the cent to dollars

since 1 dollar = 100 cent

∴ 1,968.75 cent / 100 cent

= $19.6875

≈ $19.70

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it