Why is distilled water used as a blank in spectrophotometry

52(4p+1) ≤ 4 3+12p can someone solve it for me with explanation

What are two basic questions you should ask yourself when contemplating career choices? a. what do i enjoy doing, and what do i hate doing? b. what are my least favorite subjects, and what do i do in my spare time? c. how do i discover what i like, and what do i talk about a lot? d. what do i enjoy doing, and what subjects do i like?

What is 40% of 895 and how do you find it without a calculator?