For a submarine cable, the range of signalling is governed by the function f(r) = r^2 ln⁡(1/r)

where 0
Find df/dr.

Which equation represents the model shown? a)1/3 divide 1/6 = 2 b)2/3 divide 1/6 = 2/18 c)1/3 divide 1/6 = 1/18 d)2/3 divide 1/6 =4

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?