Do the ratios 9/6 and 16/12 form a proportion

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.

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?