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A multiple choice test has 30 questions, and each has four possible answers, of which one is correct. If a student guesses on every question, what is the probability of getting exactly 9 correct?

How may permutations of the word "spell" are there?

An object travels North at #6 m/s# for #3 s# and then travels South at #5 m/s# for # 6 s#. What are the object's average speed and velocity?

A projectile is shot from the ground at a velocity of #4 m/s# and at an angle of #(pi)/2#. How long will it take for the projectile to land?

How do you find the derivative of #cos^2(4theta)#?

An object travels North at # 3 m/s# for #9 s# and then travels South at # 5 m/s# for # 4 s#. What are the object's average speed and velocity?

Question #ac5d5

How do you differentiate #f(x)=ln2x * sin4x# using the product rule?

Question #f9b61

A retailer sells 8 brands across 500 locations. What statistical test can be used to determine if a recent uptick in year over year sales is significant?

A triangle has sides A, B, and C. Sides A and B are of lengths #4# and #7#, respectively, and the angle between A and B is #(3pi)/4 #. What is the length of side C?

Question #5170b

How do you sketch #y=sin (x/2)#?

Given the following information, the older the object the less accurate this method of dating becomes. How can scientists say that the Earth is billions years old?

Does cellular respiration happen in humans or just in plants?