You work for a landscaper that has a customer needing to seed an area of land 80 feet by 40 feet in size. the garden center has 5-pound bags of grass seed. each bag of seed can cover 25 square yards of land. you calculate that the area you need to seed is 3200 square feet. you divide by 25 to find that you need 128 bags to seed the area. is this correct?

An electronics manufacturer wants to know if customers would be interested in a detachable keyboard for their tables and if so, what the most important features would be. the manufacturer partners with an electronics store to include copies of the survey with every purchase at that store for one week. which of the following best explains why this random sample is unlikely to be a good representative sample of tablet owners' preferences for a detachable keyboard? a) one week is likely not enough time to get a large enough sample. b) most people won't bother to send in the survey, which is likely to skew the results c) there is no way to verify whether the responders to the survey actually own a tablet d) the survey is biased because it was conducted through an electronics store, not the general population

Which one ? is the answer and how to find this answer

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.