Your friend sells you a bicycle for $45 and a helmet for $13.the total cost is 110% of what your friend spent originally. how much did your friend spend originally? how much money did your friend earn by selling the bicycle and helmet to you?

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