A) Find the coordinates of the centre of circle fro (i)
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B(6, 7)
PC
A(6, -7)
Find the coordinates of unknown vertices​

What is the number 321,000,000 in scientific notation? also what is the number? ?

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?