70% of fish collection died it has 60 survivors how many did he have originally

Write a numerical expression that satisfies all of the following conditions. 1.)the only number used in the expression is 5 2.)at least one exponent other than 1 is used 3.)when the expression is evaluated, the answer is greater than 40 and less than 50

Typically a point in a three dimensional cartesian coordinate system is represented by which of the following answers in the picture !

What line represents the relationship between r and s