a two digit number, let the units digit be and the tens digit be . The units digit is thrice the tens digit. If 36 is added to the number the digits interchange their place. Using the above information answer the following:
Write the number in terms of and .
Write the number formed when the digits interchange their place, in terms of and .
Hence find the original number.
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A spelunker is surveying a cave. She follows a passage 180 m straight west, then 210 m in a direction 45∘∘ east of south, and then 280 m at 30∘∘ east of north. After a fourth displacement, she finds herself back where she started. Use a scale drawing to determine the magnitude and direction of the fourth displacement .The parathyroid hormone (PTH), secreted by the parathyroid glands, is responsible for regulating blood calcium levels; it is released whenever blood calcium levels are low. PTH increases blood calcium levels by stimulating osteoclasts, which break down bone to release calcium into the blood stream.Aug 14, 20.
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