How many different four-letter arrangements can be formed using the six letters a, b, c, d, e and f, if the first letter must be c, one of the other letters must be b, and no letter can be used more than once in the arrangement?

Which graph has a rate of change of zero

Hurry which expression is equivalent to 3√x^5y?

Select the correct answer from each drop-down menu. james needs to clock a minimum of 9 hours per day at work. the data set records his daily work hours, which vary between 9 hours and 12 hours, for a certain number of days. {9, 9.5, 10, 10.5, 10.5, 11, 11, 11.5, 11.5, 11.5, 12, 12}. the median number of hours james worked is . the skew of the distribution is