Can somebody help me solve this inscribed circle?

Maria donates a fixed amount, a, to a charity each month. if she donates $300 in 12 months, what is the equation for a? a. a + 300 = 12 b. a × 300 = 12 c. a × 12 = 300 d. a + 12 = 300 e. a + 32 = 100

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

Solve the triangle. a = 21°, c = 105°, c = 5