Abby can buy an 8 pound bag of dog food for 7.50. or a or a 4 pound bag of the same dog food for 5.38.which is the better buy

The circumference of a circle is 5 pi cm. what is the area of the circle?

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

Is the figure congruent? yes or no?