Can someone help me please and thank u

A. a primary source, because it is an excerpt of a radio address given by the president

Explanation:

The above excerpt is actually "a primary source, because it is an excerpt of a radio address given by the president".

Primary sources are materials which have first-hand information. It gives a direct account of the person involved or an event the person carried out.

The "radio address" of the president is actually an original work which makes it a primary source because it gives direct account of the president's speech.

Examples of primary sources include: letters, speeches, records, autobiographies, manuscripts, etc.

we can solve this via the kinematic equation:

where the vertical velocity is zero and so:

since the height of the building is 29.3 meters then:

the ball was in motion for approximately 2.45 seconds

the first part is ocean

explanation: