Mr. Smith is designing a race where velocity will be measured. Which course would allow velocity to accurately get a winner? A: A 5-mile course from the center of town heading north to the outskirts of town
B: A 100 mater swim in a 50-meter pool
C: A 2 mile run around a 400-meter track
D: A 10-mile bike course that zigzags through the mountains and back again

Need on this one asap im almost done with this subject

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.

Which of the following is the explicit rule for a geometric sequence defined a recursive formula of a -5a for which the first term is 23?