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

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score