A train which is traveling at 80 mi/h applies its brakes as it reaches point A and slows down with a constant deceleration. Its decreased velocity is observed to be 60 mi/h as it passes a point 1/2 mi beyond A. A car moving at 50 mi/h passes point B at the same instant that the train reaches point A. In an unwise effort to beat the train to the crossing, the driver “steps on the gas.” Calculate the constant acceleration a that the car must have in order to beat the train to the crossing by 4 seconds and find the velocity v of the car as it reaches the crossing.

Aatividade em equipe consiste na sistematizaç? o crítica sobre empreendedorismo. dever? o serem retomadas as equipes feitas na semana anterior (de 3 a 4 estudantes). os estudantes dever? o retomar o negócio e as demais características que foram identificados na semana anterior (principais concorrentes do negócio, modismo ou uma tend? ncia e o risco em iniciar o negócio), para desenvolverem um plano para iniciar o negócio. desta forma, dever? o pensar em valores fictícios de máquinas e equipamentos, aluguel ou compra do local, propaganda, e estratégias para se manter no mercado.

Which of the following is characteristic of an ethnic religion? a.) the religion has spread far beyond its hearth. b.) the religion is not focused on a particular region. c.) the religion is centered on the message of a prophet. d.) the religion attempts to appeal to people everywhere. e.) the religion does not actively try to convert others

What is the top speed in a parking lot? a. 10 mph b. 20 mph c. 25 mph d. 30 mph