If a normal distribution has a mean of 20 and a standard deviation of 10, then

the median is 20 and the mode is 20.

the median is 20 and the mode is 30.

the median is 30 and the mode is 10.

the median is 10 and the mode is 30.

Derricks dog sitting and darlene's dog sitting are competing for new business. the companies ran the ads shown.which dog sitting service is more economic to use if you need 5 hours of service? explain.

Can you simplify 4/7? 24 points will be awarded!

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.