The diagram shows a circle with centre O. A, B & C lie on the circumference of this circle. Given that AC is a diameter of the circle and ∠BCA = 3 × ∠BAC, find the size of ∠BAC as highlighted in the diagram.

If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. what is the resulting expression? (4x2 + 3)(x2 – 5) (4x2 – 3)(x2 – 5) (4x2 – 5)(x2 + 3) (4x2 + 5)(x2 – 3)

Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site