The correct answer is b lave flows from a volcano and piles up
25% 6 divided by 24 will give you the percentage of copper in the bar
a constant of proportionality is a number you have to multiply x by to get y.
y=kx is the equation that expresses the proportionality of x and y
the constant of proportionality is k, so k=-5
Knowing that logarithm functions and exponential functions are inverse to each other, the procees to convert a logarithmic equation to its equivalent is to perform all the operations to set an equation of the typ:

,
then invert to show it equivalent form:

.
With that you have solved the equation for x.
Answer:
Your question doesn’t make sense homie
Step-by-step explanation: