Posted by **Beatrice** on Friday, August 15, 2014 at 9:34am.

If b books cost d dollars, then d books cost

A. b dollars

B. bd dollars

C. d^2/b

D. b^2/d

These are the worst questions. Its a SHSAT question

- math -
**Steve**, Friday, August 15, 2014 at 10:34am
set it up as a units conversion problem.

b books = d dollars, so

b bk/d dol = 1

d dol/b bk = 1

That is, books go at the rate of b/d books/dollar, or d/b $/bk

Now, you want to convert d books to dollars. You can always multiply by 1, so do it to cancel the units you don't want.

d books * d dol/b books = d^2/b dol

- math -
**Beatrice**, Friday, August 15, 2014 at 10:38am
THANK YOU SOO MUCH STEVE

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