Help this test is due at 11 ! *no links please*

The area of square garden is 300m squared. how long is the diagonal?

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?

The radius of a sphere is 3 inches. which represents the volume of the sphere?