Which statement is correct about the relationship between place values?
a. each place is 10 times the digit to its left
b. each value is 100 times the value of the digit to its left
c. each place value is 1/10 the value of the digit to its left
d. each place value is 1/100 the value of the digit to its left

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)