7) during normal breathing, about 12% of the
air in the lungs is replaced after one breath.
write an exponential model for the amount
of the original air left in the lungs if the
initial amount of air in the lungs is 500 ml.
how much of the original air is present
after 20 breaths?

d

step-by-step explanation:

by observation, we can see that the the graph is simply the graph of y = |x| that has been shifted 4 units downwards and 3 units to the left.

we can recognize in choice d :

y = | x + 3 |   - 4 (rewriting in general form)

y = | x - (- 3) |   - 4

the "-4 " term means   that the graph has been shifted by 4 units in the negative y direction

the "-3 " term means   that the graph has been shifted by 3 units in the negative x direction

this matches our observation of the graph described above.

bn,mn,n.vn.

step-by-step explanation:

1. perpendicular

2. parallel

3. perpendicular

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.