Assume the resting heart rates for a sample of individuals are normally distributed with a mean of 75 and a standard deviation of 55. Use the68-95-99.7 rule to find the following quantities.

The relative frequency of rates less than 85 using the68-95-99.7 rule is 0.975

(Round to three decimal places asneeded.)

b. The relative frequency of rates greater than 80 using the68-95-99.7 rule is 0.160.

The relative frequency of rates between 65 and 75 using the68-95-99.7 rule is __________________