Amarketing manager samples 150 people and finds that 87 of them have made a purchase on the internet within the past month. estimate the proportion of people who have made a purchase on the internet within the past month, and find the uncertainty in the estimate. estimate the number of people who must be sampled to reduce the uncertainty to 0.03

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?