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Questions in Grade High-school

[Done] The HTML source document contains the following two main sections. Select the correct option: A) Title and Body B) Paragraph and Body C) Title and Head D) Head and Body

[Done] 4. ____ is the task of buying goods of right quality, in the right quantities, at the right time and at the right price. (A) Supplying (B) Purchasing (C) Scrutinizing (D) None of the above

[Done] The scores on a national achievement test are normally distributed with a mean of 500 and a standard deviation of 100. What percentage of those who took the test had a score greater than 630?

[Done] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Done] The resting heart rates for a sample of 15 students are recorded in the following stemplot. Heart Rates \begin{tabular}{l|lllll} 5 & 5 & & & & \\ 6 & 3 & & & & \\ 6 & 5 & 9 & 9 & 9 & 9 \\ 7 & 0 & 1 & 3 & 3 & 4 \\ 7 & 5 & 6 & 7 & & \end{tabular} What is the mean resting heart rate for this sample? A. 66.0 beats per minute B. 69.0 beats per minute C. 69.9 beats per minute D. 70.0 beats per minute Key: [tex]7 \mid 5=75[/tex] beats per minute

[Done] Without actually calculating cubes, find the value of $(28)^3+(-15)^3+(-13)^3$

[Done] What would happen if N2 were added to N2(g) + O2(g) ⇌ 2NO (g) at equilibrium?

[Done] Jason combines the two intermediate steps shown. $\begin{array}{l} N_2(g)+O_2(g) \longrightarrow 2 NO(g) \\ 2 NO(g)+O_2(g) \longrightarrow 2 NO_2(g) \end{array}$ Which best describes what Jason should do with the oxygen molecules? A. Place two of them as products. B. Place two of them as reactants. C. Cancel them out because there is one in each equation. D. Double them because there is one in each equation.

[Done] Perform the following mathematical operation and report the answer to the correct number of significant figures. [tex]$3.22 \times 0.17=[?]$[/tex]

[Done] For what value of [tex]$x$[/tex] is [tex]$\frac{3 x+2}{2 x+1}$[/tex] undefined? A. [tex]$\frac{1}{2}$[/tex] B. [tex]$-\frac{1}{2}$[/tex] C. [tex]$-\frac{2}{3}$[/tex] D. [tex]$\frac{2}{3}$[/tex]