A car that travels at a speed of 20 m/s and has a mass of 1200 kg. use the formula. 1/2 mv^2
sig figs are included​

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.