Samantha said adding 6% to the cost of an item for sales tax makes the total cost 106% of the original price. joshua disagrees. is samanthas reasoning accurate?

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

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?

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer