Which situation could be BEST represented by a constant function? A. the temperature of a house with a thermostat setting of 74 degrees

B. the amount of water in a swimming pool as it is being drained

C. the speed of a passenger airplane during takeoff

D. the weight of a parked truck as furniture is being loaded

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

How do i take any fraction and make it into a decimal or percentage?