Melissa goes grocery shopping, and she is keeping track of the prices of each item that she buys. The total price of all of her items is $108.54. However, she will have to pay a 4.2% sales tax on the items she is purchasing. What will be Melissa’s total that she will have to pay for groceries?

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.