3lines are shown. a line with points a, f, d intersects a line with points b, f, e at point f. a line extends from point f to point c in between angle b f d. which angle is a vertical angle with angleefd? angledfb angleced anglebfc angleafb

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.

e^-kt = n/n0 = 0.79  

-kt = ln 0.79  

t = - ln 0.79/0.0001  

= 2357 years

step-by-step explanation: