The sum of a number z and 4 is less than 12. Which of the following ìnequalities represents thìs
statement?
O +4< 12

The answer is A x+4<12

this is due to the fact that if we use key words, sum means addition so the answer is x+4<12

54

step-by-step explanation:

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)