Math Answers

Your friend has some money to invest and is deciding between an investment in Dolly Ltd or Yaalu Ltd. In the most recent reporting period, Dolly Ltd made a profit after tax of R1 250 000 after investing R8 500 000, compared to Yaalu’s after-tax profit of R1 000 000 after investing R6 000 000. The average return that investors are currently looking for in the market is 15% (cost of capital). On the basis of the higher profit achieved, your friend believes that Dolly Ltd is the superior investment. Discuss your friend’s investment choice. In doing so, suggest other financial data that should be considered. Discuss and analyse the benefits and limitations of each. What non-financial data may be of interest to inform your friend’s investment decision?

The charge relationship for a capacitor is given by the following expression:
1/2QV = 1/2CV²

Find V if Q = 750x10^-6 colombs and C = 6x10^-6 farads

A new drug is being tested to see whether it can
increase the chance of a full recovery in people
who have had arthroscopic knee surgery. The rate of full recovery in the population of concern is
0.82. Write the correct hypotheses

Find an explicit rule for the nth term of the sequence.

2, -8, 32, -128, ...

In operation and research for transportation problem with 4 origins and 5 destinations what is the maximum number of basic cells? Explain.

A baker filled a measuring cup 3/4 cup water.he poured 1/2 of the water into the batter , and then spilled 1/8 cup of water on the floor. how much water will the baker need to add to what is left in the cup to have 50% more than what he started with%

ABC Company currently has 1/4 fewer computers than they employees

If they currently have 80 employees and they want to hire more, how many computers will they need to buy to ensure that each employee has one?

Which of the following statements about the sampling distribution of the sample mean X is not correct?

(a) For an infinite population, the standard error of the mean is always equal to the population standard deviation divided by the square root of the sample size.

or

(b) For a finite population of size N, the standard error of the mean is always equal to 1 N n n N Ï

Assume that on an average one telephone number out of 15 is busy. Which probability distribution can be used to find the probability that if 6 randomly selected telephone numbers are called, not more than three will be busy? Find the probability.

A sample of 25 items is selected from a very large shipment. It is found to have a mean weight of 310 gm and standard deviation equal to 9 gm. State and compute the 95% confidence limits for the population mean weight. (4) b) In a University, 20% of all students are graduates and 80% are undergraduates. The probability that a graduate student is married is 0.5 and the probability that an undergraduate student is married is 0.1. One student is selected at random. What is the probability that (i) he/she is married (ii) the student is a graduate if he/she is found to be married?