If Abigail took 15 hours to read a 480 page book. At this rate, how long will it take for her to read a 320 page book? pls give me the equation

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

Me with this one question, and i'll upvote the brainliest answer

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm