What are two rationales for adding centerpoints to a ffe?

a: b: in a box-wilson central composite, for a 2 5−2 experiment what is α [starpoint] factor used?

a: ≈ 0.7071
b: ≈ 1.6818
c: ≈ 2.828
d: ≈ 4.000
e: ≈ 16.000
f: not possible to do a ccc design with more than 4 factors why do pb designs not have centerpoints?
a: which are valid run sizes for a single replicate of a plackett-burman design?

a: 17
b: 132
c: 8
d: 18

Can somebody me out with this question

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.