Which of the following is equivalent to 18 sqrt -25

a: 5i
b: 18-5i
c: 18+5i
d: 23

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.  

if you're trying to figure out how much each ounce cost it would be 0.20

cents each ounce

plz mark brainliest i took the test