What is the mean absolute deviation for the data? 30, 30, 35, 35, 40 a. 3.2 b. 5 c. 10 d. 34

Determine the relationship of ab and cd given the following points

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.