The total cost (in dollars) of producing \( x \) food processors is \( C(x)=2200+30 x-0.5 x^{2} \) (A) Find the exact cost of producing the 21 st food processor. (B) Use the marginal cost to approximate the cost of producing the 21 st food processor. (A) The exact cost of producing the 21 st food processor is \( \$ 9.5 \). (B) Using the marginal cost, the approximate cost of producing the 21 st food processor is \( \$ \square \).

sessment to review what you've learned. It will not count toward your grade. ers to writo \( \\left(x^{\wedge} 2+10 x+16=0\right) \) in its factored form. Enter the losser number

\( \left. \begin{array} { l } { - ( \forall x \in R ) ( \forall y \in R ) ( x 2 + y 2 > | x | + | y | - 1 ) } \\ { - \quad ( \forall a \in R ) ( \forall b \in R ) ( \exists c \in R ) [ \sqrt { a ^ { 2 } + b ^ { 2 } } = \frac { \sqrt { a ^ { 2 } } + \sqrt { b ^ { 2 } } } { c } ] c \geq 0 } \end{array} \right. \)

8. Convert from radians to degrees. Show all work. You can type pi for the symbol \( \pi \). \( \frac{22}{15} \pi \)

in the equation \( 3 x^{2}+7 x+m=0 \), one of the roots is threes more than the other root. what is \( M= \) ?

9 A central angle of circle \( Q \) measures \( 250^{\circ} \) and its intercepted arc is \( (4 x-2)^{\circ} \). What is th value of \( x \) ? \( \begin{array}{llll}\text { A. } 53 & \text { B. } 63 & \text { C. } 73 & \text { D. } 83\end{array} \) \( \widehat{A B} \) and \( \widehat{B C} \) formed a semicircle. If the measure of \( \overparen{A B} \) is equal to \( 3 x+2 \) and the measure of \( \widehat{B C} \) is equal to \( 2 x+3 \) what is the measure of \( \widehat{A B} \) ? \( \begin{array}{llll}\text { A. } 35 & \text { B. } .80 & \text { C. } 107 & \text { D. } 120\end{array} \)