What is the length of vector v? What is the length of RR’? Also if I could get help with the rest

It is saturday morning and jeremy has discovered he has a leak coming from the water heater in his attic. since plumbers charge extra to come out on the weekends, jeremy is planning to use buckets to catch the dripping water. he places a bucket under the drip and steps outside to walk the dog. in half an hour the bucket is 1/5 of the way full. what is the rate at which the water is leaking per hour?

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Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.