(21) If \( \log_{8}(64) = x \), what is the value of \( x \)?
- (a) 2
- (b) 4
- (c) 3
- (d) 1
(22) If \( \log_{5}(125) = x \), what is the value of \( x \)?
- (a) 3
- (b) 2
- (c) 1
- (d) 4
(23) If \( \log_{a}(x) = p \) and \( \log_{b}(x) = q \), what is \( \log_{ab}(x) \)?
- (a) \(p + q\)
- (b) \(p \cdot q\)
- (c) \(p – q\)
- (d) \(q – p\)
(24) Solve for \( x \) in the equation \( 10^x = 10000 \).
- (a) 4
- (b) 3
- (c) 2
- (d) 1
(25) If \( \log_{2}(x) = 6 \) and \( \log_{4}(x) = 3 \), what is \( \log_{8}(x) \)?
- (a) 2
- (b) 3
- (c) 4
- (d) 5
