Please Help A 6.0 kg cart moves at a velocity of 12 m/s. The cart bounces off a wall causing it to rebound in the opposite direction at a speed of 18 m/s.

What is the change in the earth's momentum? At for collision is 0.45 earths is the average force from the wall on the cart?

Delta t for collisions is 0.4s

For the below questions, consider a consumer that consumes two goods, x and z with the following utility function. u with bar on top space equals space x to the power of 1 third end exponent z to the power of 2 over 3 end exponent suppose initial values for income and the prices of goods x and z are y equals 90, p subscript x equals space 10, and p subscript z equals 15 respectively, then the price of good x falls to syntax error from line 1 column 89 to line 1 column 100. unexpected '\'.. what is the magnitude of the total effect