The present age of ken and tammy are in the ratio of 2:5. In 6 years from now the ages will be in the ratio of 4:7. What are their present ages?

If a is a nonzero real number then the reciprocal of a is

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)