Solves problems involving sequences. 6. A mine worker discovers an ore sample containing 500 mg of radioactive material. Itwas discovered that the radioactive material has a half life of 1 day. About how much of theradioactive material will be present after 7 days?В. 7.8 mgC. 15.6 mgА. 3.9 mg_7. A tank contains 16 000 liters of water. Each day, one-half of the water in the tank isremoved and not replaced. How much water will remain in the tank at the end of the 7thday?D. 31.2 mgA. 250 litersB. 200 litersC. 350 litersD. 500 liters_8. A snail is crawling straight up a wall. The first hour it climbs 16 inches, the second hourit climbs 12 inches, and each succeeding hour, it climbs only three-fourths the distance itclimbed the previous hour. How far does the snail climb during the seventh hour?A. 256 729B. 256 14 197C. 729 256D. 14 197 256_9. Six days before Christmas, Sarah decided to buy gifts for her family, friends andrelatives, on the first day she bought 5 gifts, on the next day, she bought 8 and on the 3rd and4th day she bought 13 and 21 gifts. How many gifts she bought all in all before the christmasday?A. 55В. 89C. 136D. 135_10. Aling Puring's 24-hour convenience store opened eight months ago. The first monthshe made a profit of Php3,000. Each month thereafter, her profit averaged 20% greater thanthat of the previous month. How much profit did Aling Puring earn during her 8th month ofbusiness?A. Php 10, 749.5424C. Php 10, 739.5424B. Php 10, 739.5424D. Php 10, 719.5424

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Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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6. A mine worker discovers an ore sample containing 500 mg of radioactive material. I vas discovered that the radioactive material has a half life of 1 day. About how much of the adioactive material will be present after 7 days2