Answer:
Radioactive isotopes are unstable and will decay. ... The isotopes will decay into a stable isotope over time. Scientists can tell how old the rock was from looking at the radioactive isotope's half-life, which tells them how long it would take for there to be half the radioactive isotope and half the stable isotope.
The Russians had turned to a Market system.
Answer:
This week was chosen because it coincided with the birthday of Abraham Lincoln on February 12 and of Frederick Douglass on February 14, both of which dates black communities had celebrated together since the late 19th century.
Explanation:
On Feb. 2, 1990, in a dramatic concession to South Africa's Black majority, President F.W. de Klerk lifted a ban on the African National Congress and promised to free Nelson Mandela. In 1653, New Amsterdam — now New York City — was incorporated. [Most read] Health experts say not to hold out for a certain vaccine.
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<span>When you are operating a boat 28 feet long on federal waters, you must have an oil placard and garbage disposal placard on display.
Oil placard must be at-least 5 x 8 inches in size, and garbage disposal placard or save our seas placard must be at-least 4 x 9 inches in size. These cards must displayed in a prominent location.</span>
Holland is the answer to your question
