First Aid:

• Consider calculating the exponent portion first.
• It may be necessary to change the sequence of keys pressed.

Question 1

Determine 'A', given the equation:        A = 100 ( 1.03 )²⁰

First Aid:

• Consider calculating the exponent portion first.
• It may be necessary to change the sequence of keys pressed.

Question 2

Determine 'A', given the equation:        1000 = P ( 1.02 )¹⁵

.

• Divide by the '900' first.
• The opposite of the '10th' power is the '1/10th' power.  Do the same operation to both sides.
• It may be necessary to change the sequence of keys pressed when completing the '1/10th' power..

Question 3

Determine 'A', given the equation:        1000 = 900 ( 1 + i )¹⁰

First Aid:
 

• Divide by the '200' first.
• To get an exact answer, the 'log', or 'ln', keys are required.  Take the 'log' of both sides.
• The required calculation becomes     n = log ( 5 ) / log (1.01 )
• It may be necessary to reverse the sequence of keys pressed.

Question 4

Determine 'A', given the equation:        1000 = 200 ( 1.01 )ⁿ

First Aid:
 

• Divide by the '1000' first.
• To get an exact answer, the 'log', or 'ln', keys are required.  Take the 'log' of both sides.
• The required calculation becomes     n = - log ( 0.5 ) / log (1.01 )
• It may be necessary to reverse the sequence of keys pressed.

Question 5

    Determine 'A', given the equation:        500 = 1000 ( 1.01 )^-n

 

60.00	64.23	69.66
495.05	624.56	not possible

The equations with exponents are more difficult to solve. Solving for the exponent as an exact answer will require the use of the log key. The Solver option is available if Microsoft Excel is used.

Whenever possible, remember to use the same calculator.

They all get the same answers, but not with the same keystrokes