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fix per eater

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1 parent 5eb094f commit 3a2a3201e3aa16143fc3b11b38d2cd5fd3047c26 @yunfangjuan yunfangjuan committed Oct 16, 2012
Showing with 18 additions and 10 deletions.
  1. +18 −10 exercises/exponential_growth_word_problems.html
@@ -34,20 +34,23 @@
<p class="solution" data-forms="dollar"><var>END_AMOUNT</var></p>
<div class="hints">
<p>
- The interest rate is <var>RATE</var>% so the contribution
- will multiply by <span color="hint_pink"><var>MULTIPLIER</var>
- </span> a year.
+ The interest rate is <var>RATE</var>%. So after each year
+ we have <code>100</code>% of the money we started with,
+ plus another <var>RATE</var>% in interest. In other words,
+ we will have <span style="hint_pink"><var>MULTIPLIER</var>
+ </span> times off the money we started with at the end of the year.
</p>
<div>
- <p>With the beginning amount of $<var>BEGIN_AMOUNT</var>,
+ <p>With the beginning amount of
+ <code>$<var>BEGIN_AMOUNT</var></code>,
after one year, the contribution will grow to
<code>$<var>BEGIN_AMOUNT</var> \times <var>MULTIPLIER</var>
</code>.</p>
</div>
<div>
- <p>After 2 years, the contribution will grow to <code>
+ <p>After <code>2</code> years, the contribution will grow to <code>
$<var>BEGIN_AMOUNT</var> \times <var>MULTIPLIER</var> \times
<var>MULTIPLIER</var> =
$<var>BEGIN_AMOUNT</var> \times <var>MULTIPLIER</var>^2
@@ -72,8 +75,8 @@
<p>After <var>PERIODS</var> years,
$<var>END_AMOUNT</var> is available to pay for
<var>person(1)</var>'s college from
- <var>he(2) === "he"? "Uncle":"Auntie"</var> <var>person(2)</var>
- 's initial contribution of $<var>BEGIN_AMOUNT</var>.</p>
+ <var>he(2) === "he"? "Uncle":"Auntie"</var> <var>person(2)</var>'s
+ initial contribution of $<var>BEGIN_AMOUNT</var>.</p>
</div>
</div>
</div>
@@ -115,9 +118,14 @@
</p>
<div class="hints">
<div>
- <p>The return rate for the bank CD is <var>RATE_BANK</var>% so
- the investment will multiply by <var>MULTIPLIER_BANK</var>
- a year.</p>
+ <p>
+ The return rate for the bank CD is <var>RATE_BANK</var>%.
+ So after each year we have <code>100</code>% of the money
+ we started with, plus another <var>RATE_BANK</var>% in interest.
+ In other words, if we invest the money in the bank CD, we will have
+ <span style="hint_pink"><var>MULTIPLIER_BANK</var></span>
+ times off the money we started with at the end of the year.
+ </p>
<p>With the beginning amount of $<var>BEGIN_AMOUNT</var>,
after <var>PERIODS</var> years, the investment will grow to

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