Two methods of estimating uncollectible receivables are
a. the allowance method and the amortization method
b. the aging-of-accounts-receivable method and the percent-of-sales method
c. the direct write-off method and the percent-of-completion method
d. the gross-up method and the direct write-off method

For 50 pointsfredrika's science teacher asked her to bring in three abiotic items from her backyard ecosystem. which of the following groups of items should she bring? a. a lightning bug, a plug of grass, and a wormb. a smooth rock, some red dirt, and an empty bird's nestc. a ladybug, a spider, and some water from a mud puddled. a caterpillar, a pine cone, and a piece of a robin's egg