Can you please help me with this?

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.

What is the period of the sinusoidal function ?