What are the domain and range of the function? f(x)=3√x−1 ?

a) domain: (−∞, ∞)

range: (−∞, ∞)

b) domain: [0, ∞)

range: [1, ∞)

c) domain: [1, ∞)

range: (−∞, ∞)

d) domain: [1, ∞)

range: [0, ∞)

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

Which geometric principle is used to justify the construction below?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?