Suppose you are studying the effects of an herbal supplement on health by conducting a voluntary survey of people who have taken the herbal supplement recently. True or False: The method you are using to gather your cross-sectional data is an example of random sampling from the entire population.

Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills

Graph the system: f(x)= 3/x-2; f(x)= 1/2x + 2

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz