Which equation, in which k is a constant, represents an inverse proportion between the variables? v = t/k f = –kx2 pv = k y = kx – 8

The inverse proportion is PV = k

We can write the equation as P = k/V or P ∝ 1/V. Thus, P and V are inversely related.

We can rewrite V= T/k as V = kT or V ∝ T. Thus, V is directly proportional to T .

F = -kx² is neither a direct nor an inverse relation.

y = kx – 8 is a linear relation, but it is not a direct proportion because of the “-8” term.

d.) circle motion requires a force to give it a centripetal acceleration.

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.