The human body generates about 400 btus of body heat per hour while active. if an office that is 18 ft × 38 ft × 12 ft has 12 workers, how many btus per cubic foot do they produce in 5 hours? (to the nearest tenth)
a) 0.2 btus/ft3
b) 0.6 btus/ft3
c) 1.5 btus/ft3
d) 2.9 btus/ft3

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

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.