Nimnath

No need for calculus to cover the topics on Khan Academy. But, if you wish to study probability and statistics at the college level you will have to be familiar with multivariable calculus and line...

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3. About probability and statistics on Khan academy.

Let the number be n. n*5 +8 -3 = (5n+5)/5 = n+1- n = 1 +8-3 can be combined to +5

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3. Math trick

There are multiple techniques, for example, solving by factoring, by quadratic equation etc. Have a look here: https://www.khanacademy.org/math/algebra/quadratics

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3. Quadratic Equations

If you sketch the prism, then it will be easier to see how the cubes can be stacked inside. On the 2.5 cm * 2 cm bases you can stack 5 * 4 (20) cubes. Since the prism is 1cm of height, you can have...

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3. I Desperately Need Help With Geometry!!!

Let load of truck be m (in kg). Let speed of unloading of Shaun be x (kg/hour) Then speed of unloading of Jack is 2x. m/(2x+x) = 5 (hours) => m = 15x (kg) If working alone: Shaun = 15x/x = 15 (hour...

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3. How to build the equation for the word problem?

https://www.khanacademy.org/math/differential-calculus/dc-chain/modal/v/exponential-functions-differentiation-intro  

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3. How do I find the derivative of a function with x in the exponent?

Take the small triangle where the pi/2-beta has been marked. The remaining angle (that is not the right angle) = pi -(pi/2-beta + pi /2) = beta Now tan(beta) = s / t and s / t = tan(0.697) < given>...

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3. I need help with understanding this triangle problem

Your approach seems fine to me. 

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3. Confused About Flipping the > < Signs

Whilst I am not able to give you the exact breakdown I can share with you the path I followed. I studied economics at grad level, so I did learn many of the calculus topics. But when I started to l...

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3. Statistics and probability

We first look for a critical point, i.e. where the first derivative is zero. But this could be a minimum, maximum or neither. To find which one it is, we can check the sign of the first derivative,...

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3. Calculus differentiation - finding maxima of combined area