QUESTION: a car drived at an initial velocity of 8m/s, acceleration of 2.5 m/s^2, and travelled 4500m. how much time did it take to travel 4500m? (please tell me the steps)​

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

It is really hard for me right know