normal distribution question

a teacher travels from home by car each weekday. her journey times are normally distributed with a mean of 30.4 mins and a standard deviation of 3.6 mins. calculate the probability that her journey time on a particular day takes between 25 minutes and 35 minutes.

ive standardised and got p(-1.5<z<1.28), where do i go next?

Draw a bell curve and consider the region you need to find.

Are you doing old (modular) spec or new spec? The method you use depends on this.

$P( a \, < \, z \, < \, b ) = P(b) - P(a),$ using tables to find P(a) and )(a).

Can you take it forward from here?