In a computer lab, data's were stored in units of powers. A student is comparing storage capacities of different devices using exponent rule.
\(a^m \div a^n = a^{m-n}\)
(i) A hard disk stores \(2^{12}\) bytes and a USB can store \(2^{8}\) bytes.
How many times is the hard disk larger than a USB?
(ii) A laptop can store upto \(3^{19}\) bytes and a CPU of a system store upto \(3^{12}\) bytes.
How many times can the laptop store more than the CPU?
(iii) If the same formula is used to solve \(b^{8} \div b^{12}\).
Express the answer in positive exponent \(=\)
(iv) What is \(b^{8} \div b^{8}\) ?