Category "rate"

Get the rate of change by finding the change in price

UPDATE: I'm getting a strange result in the outcome. Occasionally, the earliest date of the result show after 2 or 3 etc times for example Item Kg Date_1 Price

What is the proper way of calculating this flow calculation in Objective C?

I'm attempting to make a iPhone flow rate calculator that uses these 3 formulas. Pressure ratio b b = p2 + 0.1 / p1 + 0.1 The C-value and B-Value are given