Find interest and amount to be paid on rupees 15000 at 5% per annum after 2 years

Olive's solar powered scooter travels at a rate of 30 miles per hour. what equation can she use to calculate her distance with relation to the time she traveled? h=hours m=miles 1. h=m+30 2. m=30h 3. m=h+30 4. h=30m

The price of a car has been reduced from $19,000 to $11,590. what is the percentage decrease of the price of the car?

Can anyone explain to me how to do this? anything will .