#1 what is the value of the expression 7–3? answers: a. –21b. - 1/343 c.1/343 d. 343 #2what is the value of the expression 1/5^-5? answers: a. 1/3125 b.1/25 c.25 d. 3125 #3what is the value of the expression 2/4^-3? answers: a. 1/32 b. 1/6 c.128 d.256 #4 what value of k solves the equation? k^-2=1/64 answers: a.1/8 b. 8 c. 32 d. 128 #5 what value of n solves the equation? 4^n= 1/64 answers: a. –3 b. 3 c. 16 d. 256