The function h(x) = –2x2 + 8x written in vertex form is h(x) = –2(x – 2)2 + 8. the function h(x) is shown on the graph along with the parent function, f(x) = x2.
which statement is true concerning the vertex and axis of symmetry of h(x)?

the vertex is at (0, 0) and the axis of symmetry is x = 2.
the vertex is at (0, 0) and the axis of symmetry is y= 2.
the vertex is at (2, 8) and the axis of symmetry is x = 2.
the vertex is at (2, 2) and the axis of symmetry is y = 2.

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

The surface area of the triangular prism is .

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.