Suppose p represents the amount of air pressure in a tire and t, the time it takes for the tire to go flat, equals −8. what is the value of p, if the quotient of p/t is −4?

Me because some of question i don’t understand

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis

15 liters is approximately how many gallons