Which logarithmic function has a y-intercept?
a. f(x) = log(x + 1) – 1
b. f(x) = log x + 1
c. f(x) = log(x –1) + 1
d. f(x) = log(x – 1) – 1

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of