30. Sailboat is head out to sea (against the waves) at a rate of
23km/h. The ocean current is 17km/h. What is the actual velocity of the sailboat?

6 km/h

Explanation:

Given

Velocity of Sailboat is

Velocity of ocean current is

negative sign indicated it is opposite of Sailboat

Therefore, velocity of sailboat w.r.t ocean current is

it would be rhyolitic hope this

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )