What is the percent change of 10 feet to 6 feet

40 % decrease or -40%.

Step-by-step explanation:

The decrease is 10 - 6 = 4 feet.

% decrease = (4/10) * 100

= 0.4 * 100

= 40 % decrease.

step-by-step explan mxfcg'k; uafwgzfgjhklhgation:

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)