R is greater then or equal to18
That's true. Opposite sides of a parallelogram are parallel, which implies that the opposite angles are congruent.
4 * 2 = 8
8 + 5 = 13
B, is the correct answer
Answer:

Step-by-step explanation:
We have to calculate the time derivative of T=PV/nR with P and V variable and n and R constants. This is:

What we have to do is the derivative of a product:

Substituting, we have:

where all these values are given since the time derivatives of P and V are their variation rate, using minutes.
We then substitute everything, noticing that already everything is in the same system of units so they cancel out:

And then just calculate:

Answer: 26
Step-by-step explanation:
divide 19.5 by 3/4 (0.75)