What is the least number of weights that can be used on a set of scales to weigh any whole number of kilograms from 1 to 40? Also, please explain your answer in full sentences. Thank you.

Which statement accurately explains whether a reflection over the y-axis and a 270° counterclockwise rotation would map figure acb onto itself? a coordinate plane with figure acb with point a at 1, 1, c at 3, 4 and b at 5, 1 yes, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) yes, a″c″b′ is located at a″(1, 1), c″(3, 4), and b″(5, 1) no, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) no, a″c″b″ is located at a″(1, 1), c″(3, 4), and b″(5, 1)

Based on the figures as marked, /\rqs = —

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles