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Diameter of a wheel 80cm. If the wheel rotates through an angle of 200degrees, how many cm does it move? Show steps please!? What set of reaction conditions would favor an SN2 reaction of 2-bromo-bromo-3-mehthylbutane? Describe how and where new crust material is made. Describe how and where old crust is destroyed.? White light is directed at difraction grating at angle normal to gratting.starting at norml to grating 0dgre the odr of red,gren,blue wil be? Problem involving math induction! If m and n are distinct real numbers, prove that (m+2)^2 = (n+2)^2 if and only if x+y=-4?