The typical respiratory rate for a healthy adult at rest is 12â20 breaths per minute. Average resting respiratory rates by age are: 1  birth to 6 weeks: 30â60 breaths per minute. 2  6 months: 25â40 breaths per minute.he typical respiratory rate for a healthy adult at rest is 12â20 breaths per minute. Average resting respiratory rates by age are: 1  birth to 6 weeks: 30â60 breaths per minute. 2  6 months: 25â40 breaths per minute.
Edwin Binney and Harold Smith were the men responsible of the creation of the first crayolas under their Binney & Smith company which was founded back in 1885. In 1903, he proâ¦duced the first Crayola crayons and trademarked the Crayola name with the help from Binney's wife. They first sold Crayola's in June of 1903 and had a full line of boxes from a 6-color to a 30-color although their 8-color was one of their more famous assortment sizes.
Crayola manufactures two types of chalk, extruded and molded. Extruded chalk, such as Crayola Anti-Dust White Chalk, primarily contains calcium carbonate. Molded chalk, such as Crayola Children's Chalk (available in white or colored), is a softer chalk, made of plaster of paris. This type of chalk is not dustless and not recommended for chalkboard use.