Individuals filing income tax returns received an average refund of no less than $1056. consider the group of "last minute" filers who mail their tax returns during the last five days of the income tax period (typically april 10 to april 15). a researcher suggests that a reason individuals wait is that on average these individuals receive lower refunds than do early filers. for a sample of 400 individuals who filed a tax return between april 10 and 15, the sample mean refund was $910. based on prior experience, a population standard deviation may be assumed at 1600. from these sample results, and using a significance of 0.01, what conclusion could the researcher reach regarding the mean refunds of "last minute" filers?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

You have learned about the six trigonometric functions, their definitions, how to use them, and how to represent them graphically. the sine, cosine, and tangent trigonometric functions can be paired with their reciprocal functions, cosecant, secant, and cotangent, respectively. think about how each function is related to its reciprocal function. how are the graphs of the reciprocal functions related to their corresponding original functions? what happens to the graphs of the reciprocal functions as x approaches the zeros of the original functions? describe how you would teach friends with different learning styles (visual-spatial, aural-auditory, verbal-linguistic, physical-bodily-kinesthetic, logical-mathematical, social-interpersonal, and solitary-intrapersonal) how to graph the reciprocal functions

Suzanne began a trip with 18 1/2 gallons of gas in the gas tank of her car if she hughes 17 3/4 gallons on the trip how many gallons does she have left once she finish the trip