3. what conclusion would you draw if a seismogram from a particular seismic station showed only p waves?

Explained below.

Explanation:

P waves (Primary waves ) travels faster than the other seismic waves hence these waves indicates the coming of an earthquake at any location.

S waves(secondary waves)arrive after the P waves and it shakes the ground back and forth perpendicular to the direction of motion of wave.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b