What is the hydronium ion concentration [H3O+] of a solution that has a pH of 4.12?

-1.32x10 ^ -10

7.59 x 10 ^ -5

1.32 x 10 ^ -10

-7.59 x 10 ^ -5

-9.88

9.88

The graph shows the charges for a health club in a month. make a function table for the input-output values. writes an equation that can be used to find the total charge y for the number of x classes

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?