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The administrator of a $200,000 trust fund set up by Mr Smith's will must adhere to certain guidelines. The total amount of $200,000 need not be fully invested at any one time. The money may be invested in 3 different types of securities: a utilities stock paying a 9%...

1 . √ x – 1 = 3 2 . √ x^3 = 8 3. ^ 3√ x ^2 =4 Is √ x^2 = x and identity (true for all values of x)?

Customers of a phone company can choose between two service plans for long distance calls. The first plan has a $23 one-time activation fee and charges 10 cents a minute. The second plan has no activation fee and charges 15 cents a minute. After how many minutes of...