Sorry if I post a lot I need to pass my math test LOL

A. 5^4

hope this helps

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Step-by-step explanation:

A

Step-by-step explanation:

count the 5 than put the ''^'' so its 5^4

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)

i need a picure

step-by-step explanation: