2. To mix an ultrasonic cleaning solution, 10 milliliters (mL) of concentrated cleaner is added to 500 mL of distilled water. What is the ratio of cleaner to

water?

of 10

ratio of cleaner to water = 1 : 50

Explanation:

volume of ultrasonic cleaning solution = 10 mL

volume of distilled water = 500 mL

∴ ratio of cleaner to water = 10 : 500

simplifying further

10 : 500 = 1 : 50

∴ ratio of cleaner to water = 1 : 50

what test are you taking

nope, but i have cleaned my brush in my cup of not as potentially harmful but nevertheless, very upsetting for scottish/british folks. especially if you've used the last teabag for it

explanation:

there could be something in that . . i am indeed an old scottish man!

there's a bit of bolshie-ness with it too though. i won't let go of the old ways . . tea and whisky . . whether the young whippersnappers like it or not!