Jada is putting a border around her rectangular garden. The garden is 12.63 meters long and 3.28 meters wide. This image shows a rectangular garden having a length of 12.63m and width of 3.28m.

Part A

Jada estimates the perimeter of her garden by rounding the length and width to the nearest whole number. Which equation shows her estimate?

A. 10 + 5 + 10 + 5 = 30 meters

B. 12 + 3 + 12 + 3 = 30 meters

C. 13 + 3 + 13 + 3 = 32 meters

D. 13 + 4 + 13 + 4 = 34 meters

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?