What is 38,050,000 expressed in scientific notation

What is the prime factorization of 23 ?me with this question

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )