A photographer is hired to film a special event. He a prgo a preparation fee of $150 and $45 per hour. If the total. cost for the special nt was $420, how many hours did the photographer work? Which equation could represent this situation?​

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