SOLUTION: Sarah drives east for 45mins at 80km/h, then makes a 45 degree turn into a dirt road which she drives for 30mins at 40km/h. a) Determine an exact expression for her distance tra

Question 1011945: Sarah drives east for 45mins at 80km/h, then makes a 45 degree turn into a dirt road which she drives for 30mins at 40km/h.
a) Determine an exact expression for her distance travelled.
b) Use as a calculator to determine the distance to the nearest kilometre.
Please help I'm lost :(
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
.
Distance=Rate x Time
.
=Distance east; =Rate traveled east=85 km/h;
=Time traveled east=45 min= 0.75 hour
.
=Distance at angle; =Rate traveled at angle=40 km/h;
=Time traveled at angle=30 min=0.5 hour
.
=Total distance traveled
.

.

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