If you wanted to increase your muscular endurance, it would be important to participate in activities that
a. increase the size of the muscle cells and the amount of blood that is delivered to the muscle
b. decrease the amount of fuel that the muscle can store and increase the time it takes for the muscle to contract
c. increase the number of muscles and decrease the size of the muscle cells
d. decrease the length of the muscle and increase the thickness of the muscle

Mrs. kirby, 58, is a moderately active woman. she works in the garden almost daily, occasionally walks with her friends, and babysits her three very active young grandchildren every weekend. she eats a fairly standard diet every day: she has cereal with milk and coffee for breakfast, some kind of salad for lunch, and a piece of meat or fish with a healthy of veggies for dinner. she usually skips desserts or has just a couple of strawberries. when asked to look at the food labels and calculate her intake of carbohydrates, fats, and proteins in grams over the entire day, on an average day, she came up with the following numbers: carbohydrates: 243 g fats: 41 g proteins: 63 g calculate what percentage of mrs. kirby's total energy intake came from carbohydrates.