If triangle ABC has the following measurements, find the measure of angle A. a = 17
b = 21
c = 25

A: 137.7°
B: 56.2°
C: 81.5°
D: 42.3°

List the 10 possible samples (without replacement) of size 3 3 that can be obtained from the population of five officials.

What are the relative frequencies, to the nearest hundredth, of the rows of the two-way table? group 1: a 15 b 45 group 2: a 20 b 25

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.