Confused on "their sum is to the sum of their squares as 7 is to 50." me put this in a equation

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

7. the area of the playing surface at the olympic stadium in beijing isof a hectare. what area will it occupy on a plan drawn to a scaleof 1: 500?

Human body temperatures have a mean of 98.20° f and a standard deviation of 0.62°. sally's temperature can be described by z = 1.4. what is her temperature? round your answer to the nearest hundredth. 99.07°f 97.33°f 99.60°f 100.45°f