(70 points) to approximate unemployment for the years following 1990, an economist used the function f(x) = -0.26x2 + 1.2x + 5.7, where x is the number of years since 1990 and f(x) is the percentage of americans in the labor force who were unemployed. select the function that defines the rate of change in the unemployment rate. a. f'(x) = -0.083x^3 +0.6x^2 + 5.7x +c b. f'(x) = -0.26x + 1.2 c. f'(x) = -0.52x + 1.2 d. f'(x) = 1.2x +5.7

Brent works part-time at a clothing store. he earns an hourly wage of $15. if he needs to earn more than $45 in a day and works for x hours a day, which inequality represents this situation? a. 15x > 45 b. 15x < 60 c. x > 60 d. 15x < 45 e. x < 60

State whether weight is a function of height for the six students and explain. a. yes, height is a function of weight because two students weigh 165 pounds but have different heights. b. no, height is not a function of weight because two students weigh 165 pounds but have different heights. c. yes, weight is a function of height because for each value of height there is one corresponding value of weight. d. no, weight is not a function of height because there is not enough data to determine a function.

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.