Please help???

Prove that the diagonals of a rectangle bisect each other.
Plan: Since midpoints will be involved, use multiples of __ to name the coordinates for B, C, and D.

A: 3

B: 1

C: 4

D: 2

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.

Rewrite the polynomial -9x5 + 36x4 + 189x3 in factored form.

A3cm×3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cm×3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.