Question 1116932

Given that the energy(e) varies directly as the resistance(r) and inversely as the square of the distance(d) if e=32/25, r=8 and d=5 
a) calculate the constant k
b) calculate r when e=16 and d=3
c) calculate d when r=5 and e=5/6
<pre>Correct answers: {{{highlight_green(system(matrix(1,4, "a)", k, "=", 50), matrix(1,4, "b)", r, "=", 2.88), matrix(1,4, "c)", d, "=", 10sqrt(3))))}}}