The rate of change in z at (4,9) as we change x but hold y fixed is =
3/[2sqrt(3x+2y)] put x = 4 , y = 9 = 3/[2sqrt(12+18) = 3/[2sqrt(30)] The
rate of change in z at (4,9) as we change y but hold x fixed is =
1/sqrt(3x+2y) put x = 4, y =9 = 1/sqrt(30)
9 numbers of nickels
13 numbers of quarters
Assuming you're rounding to the nearest ten-thousand, Smallest is 165,000and largest is 174,000
The answer is that the ratio of a to c is 9/5