Leona is comparing the cost of cell phone bills between two different
companies. One option gives her unlimited data and texting for $40 a
month, but charges $0.25 per minute talking on the phone. The other plan
only charges $0.10 per minute talking on the phone, but charges $60 a
month for unlimited data and texting. How many minutes would she
spend talking on the phone for the plans to be the same price?

maybe - definition of supplementary angles. im not sure. sorry

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)

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

happy to

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