Aresearcher in a small midwestern town wants to estimate the mean weekday sleep time of its adult residents. he takes a random sample of 40 adult residents and records their weekday average sleep time as 6.4 hours. the researcher knows that the population standard deviation is 1.8 hours.
what is the lower confidence limit (lcl) of the 95% confidence interval for the mean weekday sleep time of all adult residents of this midwestern town? round your answer to 2 decimal places.
the graph of x> 3 is
4(x+3) is 4x+12
-2x from both sides
-12 from both sides
divide by 2 to both sides
answer: (x,> (4x,4y)
1. by definition, dilation is as a transformation in which the figure is enlarged or reduced.
2. for dilation you have:
- a scale factor, that determines how much the figure will be reduced or enlarged.
- the center of dilation, which is defined a a fixed point in the plane.
3. if the figure is dilated with a scale factor of 4 and the center of dilation at the origin, you must multiply each coordinate of the original figure by 4, then. then, the rule is: