Arandomly generated password contains four characters. each of the four characters is either a lowercase letter or a digit from 0–9. each character in the password cannot be used more than once. what is the approximate probability that exactly one of the four characters will be a number? 1% 11% 28% 44%

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.

Is a positive integer raised to a negative power always positive