Ms. Day gave a test to her four math classes. There are 25 students in each class. There were 8 A’s in her first class, 9 A’s in her second, 10 A’s in her third, and 7 A’s in her fourth class. If there are 150 students in the grade, which of the following is the BEST prediction of how many students will earn an A on this math test?

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

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Factor the polynomial by its greatest common monomial factor.