Will give brainliest to first correct answer! A climber is on a hike. After 2 hours he is at an altitude of 400 feet. After 6 hours, he is at an altitude of 700 feet. What is the average rate of change? What is a point-slope equation for the climber?

A. 200;y-700=200(x-6)
B. 75;y-6=75(x-700)
C. 300;y-700=300(x-6)
D. 75;y-700=75(x-6)

75

step-by-step explanation:

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.