Petra bought gasoline when the odometer read 15,345.4. After the next filling, the odometer read 15665.6. It took 13.4 gal to fill the tank.

a) How many miles did she drive?
b) How many miles per gallon (mpg) did the car get?

Try this yourself, I will check it.

See my previous answer.

http://www.jiskha.com/display.cgi?id=1258317681

To calculate the number of miles Petra drove, we need to find the difference between the initial and final odometer readings.

a) Number of miles driven = Final odometer reading - Initial odometer reading
Number of miles driven = 15665.6 - 15345.4
Number of miles driven = 320.2 miles

Now, to calculate the miles per gallon (mpg), we need to divide the number of miles driven by the amount of gasoline consumed.

b) Miles per gallon (mpg) = Number of miles driven / Number of gallons consumed
Miles per gallon (mpg) = 320.2 miles / 13.4 gallons
Miles per gallon (mpg) = 23.91 mpg (rounded to two decimal places)

To find the number of miles Petra drove, you can subtract the initial odometer reading from the final odometer reading.

a) The number of miles driven = Final odometer reading - Initial odometer reading
= 15665.6 - 15345.4
= 320.2 miles

To find the miles per gallon (mpg), you'll divide the number of miles driven by the number of gallons used.

b) Miles per gallon (mpg) = Number of miles driven / Number of gallons used
= 320.2 miles / 13.4 gallons
= 23.88 mpg

Therefore, Petra drove 320.2 miles and the car got 23.88 miles per gallon.