Question

What is the value of the expression? 43 • 4−5. A. 4−15 B. 4−2 C. 42 D. 48

Answer 1

$4^3\cdot4^{-5}=4^{3+(-5)}=\boxed{4^{-2}}\to\fbox{B.}$

Answer 2

There exist a similar question wherein the expression are this way,
                                4³ · 4^-5
To answer calculate first the value of 4 raised to the exponents. That is,
                               256 ·1/1024
Simplifying gives the answer which is equal to 4^-2. Thus, the answer is letter B.