Definition: The statement formed when an equal sign is placed between two expressions is called an
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The calculations for 2, 4, 8 year can be derived as follows,
For simple interest:
S.I =
P= principle
T= Time
R= Rate
For 2 year;
S.I = = $224
Amount = $2224
For 4 year;
S.I = = $448
Amount = $2448
For 8 year;
S.I = = $896
Amount = $2896
You must travel at 42 mph for 4 hours
<em><u>Solution:</u></em>
Time varies inversely as rate of motion
Let "t" be the time required
Let "r" be the rate of motion
Then, we get
Where, "k" is the constant of proportionality
<em><u>You travel 3 hours at a rate of 56 mph</u></em>
Substitute t = 3 and r = 56 in eqn 1
<em><u>Find the rate you must travel for 4 hours</u></em>
r = ? and t = 4
Substitute t = 4 and k = 168 in eqn 1
Thus you must travel at 42 mph for 4 hours