Company uses the allowance method to account for uncollectible receivables. at the beginning of the year, allowance for bad debts had a credit balance of $ 800. during the year buddy wrote off uncollectible receivables of $ 2,000. buddy recorded bad debts expense of $ 2,500. buddy's year-end balance in allowance for bad debts is $ 1,300. buddy's ending balance of accounts receivable is $ 19,800. compute the net realizable value of accounts receivable at year-end.

You have a solution that contains phospholipid vesicles in a test tube. these vesicles have phospholipid bilayers, but do not contain any membrane transporters. you add a number of different molecules to the solution, and wait a period of time for them to equilibrate. if you could measure the concentration of each molecule, for which of the following would you expect to measure equal concentrations inside and outside of the vesicles? assume for this question that the overall osmolarity inside and outside the vesicles is the same (that is, there is no appreciable diffusion of water across the membrane). (select two answers) an amino acid with a hydrophobic side-chain a small non-polar molecule a negatively charged ion a small polar molecule a small lipid hormone

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?