A common computer programming rule is that the names of variables must be between one and eight characters long. The first character can be any of the 26 letter, while successive characters can be any of the 26 letters or any of the 10 digits. For example, allowable variable names include A, BB, and M3477K. How many different variable names are possible? (Ignore the difference between uppercase and lowercase letters.)

Joe's Assignment Average is 80, his Quiz Average is 70, and he got a 50 on the Midterm Exam. In order to get a grade of 'B' for the class, he needs a weighted average of 74. What is the minimum grade Joe needs to get on the final exam in order to get a 'B' for the class? (Enter your answer as a single integer with no words.) AV

Each box of Healthy Crunch breakfast cereal contains a coupon entitling you to a free package of garden seeds. At the Healthy Crunch home office, they use the weight of incoming mail to determine how many of their employees are to be assigned to collecting coupons and mailing out seed packages on a given day. (Healthy Crunch has a policy of answering all its mail on the day it is received.) If the answer is a whole number, write a whole number. If it has one decimal place, write one decimal place. Otherwise, round off to two decimal places. If the answer is greater than 999, put a comma.   a. Solve for Σx = Blank 1 b. Solve for Σy = Blank 2 c. Solve for Σx2 = Blank 3 d. Solve for Σy2 = Blank 4 e. Solve for Σxy = Blank 5 f. Solve for Pearson's r = Blank 6 g. Solve for the variance = Blank 7 h. Solve for the slope of the simple linear regression line = Blank 8 i. Solve for the y-intercept of the simple linear regression line = Blank 9 j. If the weight of the incoming mail is 30 lb, what…

The owner of a stereo store wants to advertise that he has many different sound systems in stock. The store carries 6 different CD​ players, 10 different​ receivers, and 9 different speakers.   Assuming a sound system consists of one of​ each, how many different sound systems can he​ advertise?