Ten balls numbered from 1 to 10 are placed in a bag.
Some are white and some are grey, as shown below.

Answer this question! 30 points and brainliest! only if you know the answer.

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?