an investment of 40000was made by a business club. the investment was split in three parts and last for a year. the first part of the investment earned 8% interest, the second 6%, and the third one 9%. the total interest for the investment was 3600. the interest from the first investment was 4 times the interest from the second. find the amount of the three parts of the investment

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

The function show two sisters' savings account and the rate at which they plan to deposit money

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0