Rueben sells electronics. he earns a 5% commission on each sale he makes. if ruben wants to make $100 in commission, what is the dollar amount of electronics he must sell?
a.$105
b.$200
c.$2,000
d.$2,105

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