In which case would you revise a hypothesis?
a. when you have no prior knowledge of a subject
b. when you do not have enough data to make a graph
c. when your experiment design does not work
d. when experimental results do not support the original hypothesis

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

In france, grapes are 1.95 euros per kilogram. what is the cost of grapes, in dollars per pound, if the exchange rate is 1.14 dollars/euro? (2.6)

Draw the structure for 5-isopropyl-2-methyl-3-nonene