7. shawna earns $12.75 per hour. how many hours does she need to work to
earn $102 or more?
at least / at most / less than / more than - _ hours

Step-by-step explanation:

Shawna needs to work for = 102/12.75 = 102*100/12.75*100

                                            = 10200/1275

                                            = 8

Shawna needs to work for 8hours to earn $102

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)

idk

step-by-step explanation: