A variant of 5.4.18. Cost of Drilling Let the sum of the last two digits of your UST student ID be m, and let k=100+m. A k-ft. oil well is to be drilled. The cost of drilling the first foot is $10.00, and the cost of drilling each additional foot is $4.50 more than that of the preceding foot. Find the cost of drilling the entire k ft. A variant of 5.4.34. Savings plans: Let p be the last digit of your UST student ID, and q=10-p. The parents of a q-year-old boy (note that we have changed the number 9 in the exercise in the book to q) have agreed to deposit $10 in their son’s bank account on his (q+1)st birthday (instead of the 10th birthday in that exercise) and to double the size of their deposit every year thereafter until his 18th birthday. [We do NOT want the answer to part a. How much will they have to deposit on his 18th birthday?] Just answer the variant of part b for your version: How much will they have deposited by his 18th birthday?
A variant of 5.4.18. Cost of Drilling Let the sum of the last two digits of your UST student ID be m, and let k=100+m. A k-ft. oil well is to be drilled. The cost of drilling the first foot is $10.00, and the cost of drilling each additional foot is $4.50 more than that of the preceding foot. Find the cost of drilling the entire k ft.
A variant of 5.4.34. Savings plans: Let p be the last digit of your UST student ID, and q=10-p. The parents of a q-year-old boy (note that we have changed the number 9 in the exercise in the book to q) have agreed to deposit $10 in their son’s bank account on his (q+1)st birthday (instead of the 10th birthday in that exercise) and to double the size of their deposit every year thereafter until his 18th birthday. [We do NOT want the answer to part a. How much will they have to deposit on his 18th birthday?] Just answer the variant of part b for your version: How much will they have deposited by his 18th birthday?
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