A database contains a relation R(x) consisting of a set of integers --- i. e, tuples with one integer attribute. Alice, Betty, and Carol are each executing the following transactions: Alice's transaction:

START TRANSACTION;
SELECT sum(x) FROM R;
COMMIT;

Betty's transaction:

START TRANSACTION;
INSERT INTO R VALUES (5);
INSERT INTO R VALUES (15);
DELETE FROM R WHERE x=10;
COMMIT;

Carol's transaction:

START TRANSACTION;
DELETE FROM R WHERE x=5;
INSERT INTO R VALUES (10);
COMMIT;

Before any of these transaction execute, the sum of integers in R is 100, and none of these integers are 5, 10, or 15. If Alice's, Betty's, and Carol's transactions run at about the same time, and each runs under isolation level READ COMMITTED, what sums could be produced by Alice's transaction?

Bill dukes has $100,000 invested in a 2-stock portfolio. $62,500 is invested in stock x and the remainder is invested in stock y. x's beta is 1.50 and y's beta is 0.70. what is the portfolio's beta? do not round your intermediate calculations. round the final answer to 2 decimal places.

Which of the following would create the most money? the initial deposit is $6,500 and the required reserve ratio is 20 percent. the initial deposit is $3,000 and the required reserve ratio is 10 percent. the initial deposit is $7,500 and the required reserve ratio is 25 percent. the initial deposit is $4,500 and the required reserve ratio is 15 percent.

3. saving two consumers, larry and jeff, have utility functions defined over the two periods of their lives: middle age (period zero) and retirement (period 1). they have the same income in period 0 of m dollars and they will not earn income in period 1. the interest rate they face is r. larry’s and jeff’s utility functions are as follow. = 0.5 + 0.5 and = 0.5 + 0.5 for each person is between zero and one and represents each consumer’s temporal discount econ 340: intermediate microeconomics. ben van kammen: purdue university. rate. a. write the budget constraint that applies to both jeff and larry in terms of consumption in each period and ), interest rate, and m. b. what is larry’s and what is jeff’s marginal rate of intertemporal substitution? c. what is the slope of the budget constraint? d. write each consumer’s condition for lifetime utility maximization. e. re-arrange the conditions from part (d) to solve for the ratio, . f. if > which consumer will save more of his middle age income? g. if > 1 1+ , in which period will larry consume more: = 0 or = 1?