By definition pH = - log H+], where H*] is the hydrogen concentration in $ ltext(moles per liter]$. If the pH of a solution is 3, what would the [H+] in the solution (written in scientific notation)?

Find x & pleeeeaaaassseeee me !

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236