MATH/CMSC 206 - Introduction to Matlab

Answers to Self-Test

 1. Calculate the number of seconds in an hour by entering 60 * 60.

60 * 60

ans =

        3600

2. Calculate the number of seconds in a day, making use of your previous answer, ans.

ans * 24

ans =

       86400

3. Create variables called secondsPerYear and initialize it with the correct value making use of your previous answer.

secondsPerYear = ans * 365

secondsPerYear =

    31536000

 4. Create another variable called myAge and set it equal to your age, in years.

myAge = 42;   % put your age here instead of Fawzi's

 5. Save the variables you created in a file called yearVars.

save yearVars

 6. Clear all existing variables. [Look in the Workspace pane to be sure that the variables are really gone.]

clear

 7. Bring back the variables that you stored in the file yearVars.

load yearVars

 8. Using your previous variables, calculate your approximate age, in seconds.

myAge * secondsPerYear

ans =

  1.3245e+009

9. How old is a person when they reach the age of a billion seconds?

1000000000 / secondsPerYear

ans =

   31.7098