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1. On 15 November in each of the years 1964 to 1979 inclusive an investor deposited £500 in a special bank savings account. On 15 November 1983 the investor withdrew his savings. Given that over the entire period the bank used an annual interest rate of 7% for its special savings accounts, find the sum withdrawn by the investor.
Y10with usual OLS assumptions. Derive the expression for the error variance.
A town has a population of 2000 and grows at 4% every year. What will be the population after 15 years, to the nearest whole number?
Trey has 9 new magazines to read. Let M be the number of magazines he would have left to read after reading R of them. Write an equation relating M to R. Then graph your equation using the axes below.
Three neon lights colored red, blue and green flash at different time intervals. The red light flashes after every 18 seconds and the green light after every 15 seconds. If all the three lights flash together at 8:00 am, how many times will all three lights flash together by 9:30 am.
Please show your full steps answer.
Find the last digit of the sum
0! + 2! + 4! +...+ 2010! + 2012!
Please show full steps answer.
Twelve cowboys sit in a circle around a bonfire. Each observes that his age (viewed as integer) is the average of the ages of his left and right neighbors. What is the sum of their ages?
Please show your answer with all complete steps.
The lifetime of a certain kind of bulb has a normal distribution with mean of 500 hours and standard deviation of 45 hours
Find the percentage of bulbs with a lifetime of at least 570 hrs
The percentage of bulbs with lifetime in between 485 and 515 hrs
The minimum lifetime of the best 5% of the bulbs
The lifetime of an electrical component normally distributed with mean 800 hrs and standard deviation of 60 hrs.
What is the probability that the component will fail before 680hrs
If standard deviation remain 60 hrs what would have been the mean to ensure that not more than 10% of the components fail before 800hrs.
A company study of product preferences of 10,000 consumers is as follows: products A. B and C were liked by 5015, 3464 and 4827 consumers, respectively. All the three products were liked by 500 consumers. Products A and B were liked by 1000 consumers. Products A and C were liked by 850 consumers. Products B and C were liked by 1420 consumers.
1) Prove that the study results are incorrect.
2)It was found that an error occurred in recording the number of consumers liking the products A and C. What is the value of this number?
#340153 on Dec 2023