Please help me :) I really need these and I’ll give a lot of points if you can answer them all::

Ithink i know it but i want to be sure so can you me out ?

Select the correct answer. which exponential function has an x-intercept? oa. (x) - 100x-5-1 ob. (x) = 3x4+2 oc. kx) = 7x-1 + 1 od. 1(x) =-3x+1 - 3

The formula to determine energy is e=1/2mv2? what is the formula solved for v?