Geography, 30.11.2019 02:31 Thania3902
Aradioactive isotope of the element potassium decays to produce argon. if the ratio of argon to potassium is found to be 7: 1, how many half-lives have occurred? a. 1 half-lifeb. 3 half-livesc. 7 half-livesd. 8 half-lives
Answers: 2
Geography, 21.06.2019 20:30
Using complete sentences, describe the central economic problem facing all humans. why does this require people to make choices? how can this result in opportunity costs?
Answers: 2
Geography, 22.06.2019 04:10
Which summarizes the relationship between density of an element and its distribution in earth? a. the greater an element’s density, the greater the amount of it found in the crust. b. the denser an elements is, the smaller the amount of it earth core. c. the greater an elements density, the smaller the amount of it’s found in the crust
Answers: 3
Geography, 22.06.2019 10:00
Why is the price of rice so important? a. rice prices must be kept within reach of the poorest peopleb. rice prices must make a large profit or no one will grow itc. rice prices impact the cost of fruits and vegetables on neighboring farmsb. rice prices have no real importance other than to large corporations
Answers: 1
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