PL GUYS NOW FAST, This question has two parts. First, answer Part A. Then, answer Part B. Part A

Adrian pays his niece $30 to babysit for 5 hours.

Which expression models the change in the amount of Adrian's cash each hour that his niece babysits?

Multiple choice question.

A)

30−5

B)

–30·5

C)

−30÷5

D)

–5÷30

Part B

What was the change in Adrian's cash each hour?

Multiple choice question.

A)

–$150

B)

–$6

C)

–$3

D)

$25

Part A would be C because divided 30 by 5 to get the unit rate.

Part B would be B

C). −30÷5

B). –$6

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)

answer is x<