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Questions in mathematics

[Free] Select the correct answer. A volleyball player sets a volleyball straight up into the air. The height of the volleyball, [tex]h(t)[/tex], is modeled by this equation, where [tex]t[/tex] represents the time, in seconds, after that ball was set. [tex]h(t)=-16 t^2+20 t+6[/tex] The volleyball reaches its maximum height after 0.625 seconds. What is the maximum height of the volleyball? A. 11.625 feet B. 1.625 feet C. 8.5 feet D. 12.25 feet

[Free] Use the distributive property to write an equivalent expression. [tex]8(5 m+5)[/tex]

[Free] $\begin{array}{l} h(x)=x^2+1 \quad k(x)=x-2 \\(h+k)(2)=\square\end{array}$

[Free] Let $u =P Q$ be the directed line segment from $P(0,0)$ to $Q(9,12)$, and let $c$ be a scalar such that $c<0$. Which statement best describes $c u$ ? A. The terminal point of $c u$ lies in Quadrant II. B. The terminal point of $c u$ lies in Quadrant IV. C. The terminal point of $c u$ lies in Quadrant I. D. The terminal point of $c u$ lies in Quadrant III.

[Free] Mr. Green orders some cookies from a local youth group. Using his order form shown below, complete the last column to find the total to be paid. \begin{tabular}{|l|l|l|l|} \hline Quantity & Description & Unit Price & Total of Line \\ \hline 2 & Krispy Kosmos & \$2.89 & \$ \\ \hline 1 & Chewy Chocos & \$3.19 & \$ \\ \hline 1 & Gooey Globs & 2.99 & \$ \\ \hline & & & \\ \hline & & Total & \$ \\ \hline & & 5.8\% tax & \$ \\ \hline & & Total to be paid & \$ \\ \hline \end{tabular} a. $9.60 b. $11.96 c. $12.65 d. $18.90

[Free] If [tex]$\tan x^{\circ}=\frac{6}{g}$[/tex] and [tex]$\sin x^{\circ}=\frac{6}{h}$[/tex], what is the value of [tex]$\cos x^{\circ}$[/tex]? A. [tex]$\cos x^{\circ}=\frac{h}{g}$[/tex] B. [tex]$\cos x^{\circ}=\frac{g}{h}$[/tex] C. [tex]$\cos x^{\circ}=g h$[/tex] D. [tex]$\cos x^{\circ}=6 g$[/tex]

[Free] Find an ordered pair to represent [tex]\vec{t}[/tex] in the equation [tex]\vec{t}=-8 \vec{u}[/tex] if [tex]\vec{u}=\langle-1,4\rangle[/tex] and [tex]\vec{v}=\langle 3,-2\rangle[/tex]. a. [tex] \{8,-32\} [/tex] c. [tex] \{-32,8\} [/tex] b. [tex] \langle 16,-4\rangle [/tex] d. [tex] \langle-4,16\rangle [/tex] Please select the best answer from the choices provided

[Free] This isosceles triangle has two sides of equal length, $a$, that are longer than the length of the base, $b$. The perimeter of the triangle is 15.7 centimeters. The equation $2 a+b=15.7$ can be used to find the side lengths. If one of the longer sides is 6.3 centimeters, what is the length of the base? $\square$ cm

[Free] Which problem can be solved using this equation? [tex]x+2=\frac{1}{4}(42)?[/tex] A. Mary had 42 empty boxes when she started packing yesterday. Today, she is 2 short of having [tex]$\frac{1}{4}$[/tex] of the boxes filled. How many boxes are filled? B. Mary had 42 empty boxes when she started packing yesterday. Today, she is 2 short of having [tex]$\frac{1}{4}$[/tex] of the boxes filled. How many boxes are still empty? C. Mary had 42 empty boxes when she started packing yesterday. Today, she is 2 short of having [tex]$\frac{1}{4}$[/tex] of the boxes filled. How many additional boxes does Mary need? D. Mary had 42 empty boxes when she started packing yesterday. Today, she is 2 short of having [tex]$\frac{1}{4}$[/tex] of the boxes filled. How many boxes will Mary have left to fill tomorrow?

[Free] Calculate the average rate of change of [tex]f(x)=4 x^2-3 x+5[/tex] on the interval [1, 4]. a.) 21 b.) [tex]\frac{1}{17}[/tex] c.) 17 d.) 31.5