How does the H+ concentration of a solution with a pH of 4 compare with that with a pH of 2?

What is the point slope form of a line with slope -5 that contains point (2,-1)

Is there a direction u in which the rate of change of f(x,y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.

Find the solution on the interval [0, 2pi)