document.write( "Question 153099This question is from textbook
\n" ); document.write( ": Hello, Im would appricate an help that you can offer me. Im working on rate, unit and proportions. I have read through my chapter and still a little puzzled.\r
\n" ); document.write( "\n" ); document.write( "1. a diver descends 10 ft in 16 sec. What is the rate of descent in feet per second?\r
\n" ); document.write( "\n" ); document.write( "2. An 18-oz jar of blackberry jam is on sale for $4.50. find the unit price in dollars per ounce.\r
\n" ); document.write( "\n" ); document.write( "3. Determine whether the pairs 10,8 and 38, 26 are proportional.\r
\n" ); document.write( "\n" ); document.write( "I think i can figure out the problems but im not sure how i would show the work. Please help. thank you Cheryl \n" ); document.write( "
Algebra.Com's Answer #112592 by nerdybill(7384)\"\" \"About 
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1. a diver descends 10 ft in 16 sec. What is the rate of descent in feet per second?
\n" ); document.write( "If a \"diver descends 10 ft in 16 sec\" the rate is:
\n" ); document.write( "10 ft per 16 secs
\n" ); document.write( "as a \"ratio\" it would be:
\n" ); document.write( "10 ft/16 secs
\n" ); document.write( "if we want it, in terms of \"per second\", we simply divide 10 by 16 to get:
\n" ); document.write( "0.625 ft/1 sec
\n" ); document.write( "or, we could eliminate the '1' and rewrite it as:
\n" ); document.write( "0.625 ft/sec
\n" ); document.write( ".
\n" ); document.write( "2. An 18-oz jar of blackberry jam is on sale for $4.50. find the unit price in dollars per ounce.
\n" ); document.write( "If \"An 18-oz jar of blackberry jam is on sale for $4.50\" the cost is:
\n" ); document.write( "$4.50 per 18 ozs
\n" ); document.write( "as a \"ratio\" it would be:
\n" ); document.write( "4.50 dollars:18 ozs
\n" ); document.write( "or
\n" ); document.write( "4.50 dollars/18 ozs
\n" ); document.write( "if we want it, in terms of \"per ounce\", we simply divide 4.50 by 18 to get:
\n" ); document.write( "0.25 dollars/1 oz
\n" ); document.write( "or, we could eliminate the '1' and rewrite it as:
\n" ); document.write( "0.25 dollars/oz
\n" ); document.write( ".
\n" ); document.write( "3. Determine whether the pairs 10,8 and 38, 26 are proportional.
\n" ); document.write( "For any proportion say:
\n" ); document.write( "a/b = c/d
\n" ); document.write( "'b' and 'c' are called the \"means\"
\n" ); document.write( "and
\n" ); document.write( "'a' and 'd' are called the \"extremes\"
\n" ); document.write( "if two ratios are proportional then:
\n" ); document.write( "bc = ad
\n" ); document.write( ".
\n" ); document.write( "For your pairs, 10,8 and 38,26, we could write each ratio as:
\n" ); document.write( "10:8 and 38:26
\n" ); document.write( "If they were proportional, then we could set each ratio equal to each other:
\n" ); document.write( "10:8 = 38:26
\n" ); document.write( "or
\n" ); document.write( "10/8 = 38/26
\n" ); document.write( "to check whether they are proportional, multiply means and extremes:
\n" ); document.write( "10*26 = 8*38
\n" ); document.write( "260 = 304
\n" ); document.write( "Since they are NOT equal -- the ratios are NOT proportional.
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