What is 10∠ 30 + 10∠ 30? answer in polar form. note that the angle is measured in degrees here. to enter a complex number in polar form ( a ∠ b), c?

Write an equation in slope intercept form of the line passes through the given point and is parallel to the graph of the given equation (0,0); y=3/8 x+2

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.

Charlie tosses five coins.what is the probability that all five coins will land tails up.