To seal penetrations of the roof by equipment, _____ is installed under the roofing material and up the sides of the equipment.

Karen Company had the following account balances prior to the write off of a $100 customer account: Accounts receivable $9,500 Allowance for doubtful accounts 400 The net realizable value of the receivables before and after the write-off was:

A) $9,100 $9,100 B) $9,500 $9,000 C) $9,100 $9,000 D) $9,000 $9,000 E) $9,400 $9,100

The null hypothesis for Pearson's correlation coefficient states there is an association between the two variables in the population and that the correlation coefficient is one.

a. true b. false