please help .
From the equation, what is the value of the radius, r ? x2 + y2 = 144

Which of the following is the shape of a cross section of the figure shown below

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m