Answers edited by Kha L.

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How do you find the derivative of $f (x) = - 2 x^{- 3} + x^{2} - 7$ $f(x)=-2x^-3+x^2-7$ ?
What is the equation of the line that is normal to the polar curve $f (θ) = 2 sin (3 θ + \frac{π}{3}) - 2 θ cos θ$ $f(theta)=2sin(3theta+pi/3) - 2thetacostheta$ at $θ = \frac{π}{4}$ $theta = pi/4$ ?
1, 2, 4 and 8 are factors of which number? 8, 6, 12, or 20?
Compute $i + i^{2} + i^{3} + \dots + i^{258} + i^{259}$ $i+i^2+i^3+\cdots+i^{258}+i^{259}$ . ?
One canned juice drink is 25% orange juice; another is 5% orange juice. How many liters of each should be mixed together in order to get 20L that is 6% orange juice?
What comes next in this sequence of prime numbers? 11, 13, 17, 19, ?
What is the derivative of $\frac{cos (x)}{2 + sin (x)}$ $( cos (x) ) / ( 2 + sin (x) )$ ?
How do you name an angle between $0^{\circ}$ $0^circ$ and $360^{\circ}$ $360^circ$ that is coterminal with the angle $- 210^{\circ}$ $-210^circ$ ?
What is the Cartesian form of $(- 4, \frac{- 21 π}{4}))$ $(-4,(-21pi)/4))$ ?
What is the orthocenter of a triangle with corners at $(4, 9)$ $(4 ,9 )$ , $(7, 4)$ $(7 ,4 )$ , and (8 ,1 )#?
What are the factors of 5 & 15?
How do you find the absolute extrema of $f (x) = x^{3} + x^{2} - 4 x - 4$ $f(x) = x^3 + x^2 - 4x - 4$ on the closed interval $[- 3, 0]$ $[-3, 0]$ ?
$\int sin θ sin 2 θ sin 3 θ$ $int sin theta sin2theta sin3theta$ ?