Two previously undeformed specimens of the same metal are to be plastically deformed by reducing heir cross-sectional areas. one has a circular cross section, and the other is rectangular, during deformation the circular cross section is to remain circular, and the rectangular is to remain as such. their original and deformed dimensions are as follows:
circular diameter, ( mm) rectangular (mm)
original dimensions 15.2 125 × 175
deformed dimensions 11.4 75 x 200
which of these specimens will be the hardest after plastic deformation, and why?

As part of an annual fundraiser to raise money for diabetes research, diane joined a bikeathon. the track she biked on was 1,920 yards long. diane biked 38.5 laps. her sponsors agreed to donate an amount of money for each mile she biked. how many miles did she bike? first fill in the blanks on the left side using the ratios shown. then write your answer. given ratios: 5280ft / 1 mi , 1 mi /5280 ft , 1,920 yards / 1 lap , 1 lap / 1,920 yards , 3 ft / 1 yard , 1 yard / 3 ft. blanks: 38.5 laps / 1 yard x (blank) x (blank) x (blank) = (blank) miles i'm really confused on how to do this, and the explanations aren't exactly . if you could walk me through how to do this, it would be greatly appreciated.