How do you solve `log_8 z<=-2`?

Related questions

• What is a logarithm?
• What are common mistakes students make with logarithms?
• How can a logarithmic equation be solved by graphing?
• How can I calculate a logarithm without a calculator?
• How can logarithms be used to solve exponential equations?
• How do logarithmic functions work?
• What is the logarithm of a negative number?
• What is the logarithm of zero?
• How do I find the logarithm `log_(1/4) 1/64`?
• How do I find the logarithm `log_(2/3)(8/27)`?