In Tilton school there are 380 students in key stage 3
240 students in key stage 4
110 students in ket stage 5
phoebe is carrying out a survey she needs a sample of 100 students stratified by key stage 3 there should be in the sample

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°

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 . reset next