Answer:
DC equals EC times AC all over BC
Explanation:
The parallel lines divide the segments proportionally, so you have ...
DC/AC = EC/BC
Multiplying by AC gives ...
DC = (EC·AC)/BC . . . . . . matches the 1st Choice
Answer:
That is much less often than in the last 150 million years, when the field has flipped every 600,000 years. In the last 10-20 million years it has sped up even more, to once every 200,000-250,000 years. "The evidence points to a more stable field in the very far past and fewer reversals," says Veikkolainen.
Answer:
Aquaculture has been considered as an option to cope with the world food demand. However, criticisms have arisen around aquaculture, most of them related to the destruction of ecosystems such as mangrove forest to construct aquaculture farms, as well as the environmental impacts of the effluents on the receiving ecosystems. The inherent benefits of aquaculture such as massive food production and economical profits have led the scientific community to seek for diverse strategies to minimize the negative impacts, rather than just prohibiting the activity. Aquaculture is a possible panacea, but at present is also responsible for diverse problems related with the environmental health; however the new strategies proposed during the last decade have proven that it is possible to achieve a sustainable aquaculture, but such strategies should be supported and proclaimed by the different federal environmental agencies from all countries. Additionally there is an urgent need to improve legislation and regulation for aquaculture. Only under such scenario, aquaculture will be a sustainable practice.
A majority of respondents — 64 percent — said too much emphasis has been placed on testing, and a majority also said the best way to measure the success of a school is not through tests but by whether students are engaged and feel hopeful about the future.
By reducing the need for fossil fuels through the use of the ethanol biofuel.
