If the plankton contain 100,000 kcal of energy, about how
much energy will the manta ray obtain from eating the
starfish?

Who gave the famous "i have a dream" speech at the march on washington?

Toward the end of the roman empire, what caused a decrease in the use of coined money tell me now

The bill of rights includes things such as the right to bear arms and freedom of speech. these are examples of which american value?