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Key Concepts Quiz 1.4
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Evaluating Formulas Worked Example (22.0K)


The formula for the interest paid on a bank account is I = Prt. Find the interest due on a principal of $4000 at a rate of 1.5% over a term of 5 years.
C)$20 000
D)$30 000

The fuel burned, in litres, for a small airplane is calculated using the formula <a onClick="'/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007092242x/118750/MATC9_Ch01_4_KeyConcepts_Quiz_Q2.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (1.0K)</a> where H is the engine horsepower and t is the time in hours. Find the fuel burned by a 225 horsepower aircraft flown for six hours.
A)24 litres
B)36 litres
C)216 litres
D)900 litres

A rectangular window measures 1.4 m by 2.1 m. Find the area of glass required.
A)2.94 m2
B)3.5 m2
C)5.83 m2
D)7.0 m2

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