Tiffany answered 90% of the questions on your math test correctly. there were 50 questions on the test. how many questions did tiffany answer correctly?

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is . reset next

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)