The mean selling price of new homes in a city over a year was $115,000. the population standard deviation was $25,000. a random samples of 100 new homes is taken. a. what is the probability that the sample mean selling price was more than $110,000? b. what is the probability that the sample mean selling price was between $113,000 and $

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

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