Please help Which statement accurately describes a step function? Select all that apply.
1. The domain and range of a step function is all real numbers.
2. A step function consists of any linear function including horizontal and vertical lines.
3. Each piece of a step function is represented by a linear function with a slope equal to zero.
4. A step function consists of only horizontal lines.
5. Each piece of a step function is represented by a linear function with a slope greater than 0.
6. A step function is a type of piecewise-defined function.

Muscles, a membership-only gym is hoping to open a new branch in a small city in pennsylvania that currently has no fitness centers. according to their research approximately 12,600 residents live within driving distance of the gym. muscles sends out surveys to a sample of 300 randomly selected residents in this area (all of who respond) and finds that 40 residents say they would visit a gym if one was located in their area. based on the past survey research, muscles estimates that approximately 30% of these respondents would actually join the gym if they opened one in the area. based on this information and the results of the sample survey, about how many residents should muscles expect to join its new branch? a) 134 b) 504 c) 1,680 d) 3,780

The weights of players in a basketball league are distributed normally. the distance (d) of each player's weight (w) from the mean of 86 kilograms was computed as follows: d = |w - 86| if d is greater than 7 for approximately 5% of the players, what is the approximate standard deviation of the players' weights? a. 1.75 kilograms b. 3.5 kilograms c. 4.3 kilograms d. 7 kilograms

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.