Videobusters, inc. offered books of video rental coupons to its patrons at $40 per book. each book contained a certain number of coupons for video rentals. during the current period 500 books were sold for $20,000, and this amount was credited to unearned rental revenue. at the end of the period, it was determined that $15,000 worth of coupons had been used by customers to rent videos. the appropriate adjusting entry at the end of the period would be:
a. debit rental revenue $5,000 and credit unearned rental revenue $5,000.
b. debit rental revenue $15,000 and credit unearned rental revenue $15,000.
c. debit unearned rental revenue $5,000 and credit rental revenue $5,000.
d. debit unearned rental revenue $15,000 and credit rental revenue $15,000.

The answer is:

Dr Unearned rental revenue $15,000

Cr Rental Revenue $15,000

Explanation:

According to the revenue recognition principle, Videobusters should only recognize revenue when it has substantially completed the earnings process. So the $20,000 it received from selling rental coupons should be credited to Unearned rental revenue. But after $15,000 worth of coupons were actually used to rent videos, then  they should change $15,000 to earned revenue. They should do this by debiting Unearned rental revenue and crediting rental revenue.

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explanation:

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bd = 9 cm

step-by-step explanation:

in a 30°-60°-90° triangle, the ratio of side lengths is 1 : √3 : 2. that is, the longest side (hypotenuse) is twice the length of the shortest side.

all of the triangles in your geometry are 30°-60°-90° triangles. ac is the hypotenuse of δacd, and the short side of δabc.

the short side ad of δacd will be half the length of ac, so 3 cm. the hypotenuse ab of δabc will be twice the length of ac, so 12 cm. segment bd is the difference of the lengths ab and ad, so is

bd = ab -ad

bd = 12 cm - 3 cm = 9 cm

comment on side length ratios

you can figure the ratios of side lengths in a 30°-60°-90° triangle by considering the trig ratios of the angles. or you can figure the length of the altitude of an equilateral triangle of side length 2 using the pythagorean theorem.