You measure age (years), weight (pounds), and marital status (single, married, divorced, widowed) of 1400 women. how many variables did you measure?
a. 1 b. 2 c. 3 d. 4

5/6

step-by-step explanation:

if i remember correctly with perpendicular stuff you just take away the negative

step-by-step explanation:

one of the most important purposes of surface treatment is to alter surface properties according to the requirement of specific applications. for example, hydrophobic coating has been utilized on windshield and eyeglasses. gold atom monolayer on substrate has become a popular surface bioconjugation strategy.