Janushelloan Janushelloan 08-12-2016 Mathematics contestada what makes the statement true 9^-2 = a)81 b)18 c)1/81 d)-1/81 evaluate the expression 8^-2 x 4^0 16 64 -64 1/64 write 5^ x 5^-1 x 5^3 as a single exponent. 5^4 5^-6 5^5 5^2 what is 8.57 x 10^-4 in standard form 85,700 0.00857 8,750,000 0.000875