Để đánh giá mức độ cân đối giữa thời gian học bài ( Y: giờ/ngày ) và thời gian vui chơi ( X: giờ/ngày ), người ta khảo sát 120 học sinh và thu được bảng kết quả sau

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42

The number of members f(x) in a local swimming club increased by 30% every year over a period of x years. the function below shows the relationship between f(x) and x: f(x) = 10(1.3)xwhich of the following graphs best represents the function? graph of f of x equals 1.3 multiplied by 10 to the power of x graph of exponential function going up from left to right in quadrant 1 through the point 0, 0 and continuing towards infinity graph of f of x equals 10 multiplied by 1.3 to the power of x graph of f of x equals 1.3 to the power of x