Which answer shows a correct order to solve this story problem?

maurine had to pay $2.52 tax on her purchases. she bought 3 books for $12.99 each, 2 pens for $0.69 each, and a magazine for $2.99. how much did maureen spend?

a.
step 1: add the price of a book and a pen.
step 2: multiply by 3 and then by 2.
step 3: add $2.99 to that result.
step 4: add the tax to the total of the purchases.

b.
step 1: calculate the total price of the 2 pens.
step 2: add $2.99 to that total.
step 3: calculate the total price of the 3 books.
step 4: add the tax to the price of the 3 books

c.
step 1: calculate the total price of the 3 books.
step 2: calculate the total price of the 2 pens.
step 3: add $2.99 to the total of the cost of the books and pens.
step 4: add the tax to the total of the purchases.

d.
step 1: add $2.99 to the amount of the tax.
step 2: calculate the total price of the 2 pens.
step 3: calculate the total price of the 3 books.
step 4: add the prices of the pens to the price of the books.

Can someone with this one pre-calc question? the finishing time for a runner completing the 200-meter dash is affected by the tail-wind speed, s. the change, t, in a runner's performance is modeled by the function shown below: t= 0.0119s^2 - 0.308s - 0.0003 predict the change in a runner's finishing time with a wind speed of 3 meters/second. note: a negative answer means the runner finishes with a lower time. round to the nearest hundredth.

What is the value of x? enter your answer in the box. photo attached.

Ascientist studied a population of workers to determine whether verbal praise and/or tangible rewards affect employee productivity. in the study, some workers were offered verbal praise, some were offered tangible rewards (gift cards, presents, and some were offered neither. the productivity of each participant was measured throughout the study by recording the number of daily tasks completed by each employee. which inference might the scientists make based on the given information? a.) the number of daily tasks completed by each employee may influence the dependent variable, which is whether the employee receives verbal praise, tangible rewards, or neither. b.) verbal praise and/or tangible rewards may influence the independent variable, which is the number of daily tasks completed by each employee. c.) verbal praise and/or tangible rewards may influence the dependent variable, which is the number of daily tasks completed by each employee. d.) the dependent variables, which are verbal praise and tangible rewards, may influence the number of daily tasks completed by each employee.