Ank estimated that he drove about 450 miles in a week. He actually drove 485 miles. Find the percent error in Hank's estimate. Round to the nearest whole percent.

7.2%

Step-by-step explanation:

Given data

Estimate=450miles

Actual= 485 miles

%error= actual-estimate/ actual*100

%error=35/ 485*100

%error=0.072*100

%error=7.2%

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)