Kareem wants to find the number of hours the average sixth-grader at his school practices an instrument each week. which is the best way kareem can get a representative sample? he can randomly survey 50 boys in the school. he can survey 30 students in the school band. he can randomly survey 50 sixth-graders in the school. he can survey 20 friends from his neighborhood.

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

I'm confused on this could anyone me and show me what i need to do to solve it.