PLEASE HELP URGENT What division problem does this area model represent?

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÷ 45 =
R
Rectangle with left side labeled 45. Vertical lines divide the rectangle into three parts. The left part has 80 above it and 3600 inside it. The middle part has 7 above it and 315 inside it. The right part has 32 inside it and nothing above it.

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

Are the corresponding angles congruent? explain why or why not.

Given: δabc, m∠1=m∠2, d∈ ac bd = dc m∠bdc = 100º find: m∠a m∠b, m∠c