exam Maths Puzzle Numerical Ability

kaylene is 30 yrs. old and jessica is 22 yrs. old. how many years ago was kaylene twice as old as jessica?

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exam Other Question

To estimate animal populations, biologists count the total number of animals in a small section of a habitat. The total population of animals is directly proportional to the size o Please explain to me how to round the answer to the nearest thousandth


t=(35)/(16)+(~(33))/(16),t=(35)/(16)-(~(33))/(16)

Thank you