Salma got prepaid debit card with 15 on it. for her first purchase with the card, she bought some bulk ribbon at a craft store. the price of the ribbon was 22 cents per yard. if after that purchase there was 8.84 left on the card how many ribbons did salma buy

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