Atrain travels 42 kilometers in 15 minutes. how far will the train travel in 3 hours at that speed?

a.
168 km

b.
336 km

c.
504 km

d.
672 km

What is the smallest integer n such that n\sqrt{2} is greater than 20

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y