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Questions in Grade High-school

[Solved] Did the Progressive Era changes, like breaking up big companies, giving women the right to vote, and making new government rules, really fix the problems caused by big cities and factories? Why or why not?

[Solved] Sound intensity $(I)$ is measured in watts per meter squared $\left(\frac{W}{m^2}\right)$, and the loudness of the sound, $L(I)$, which is measured in decibels $(d B)$, is decreased by the function $L(I)=10 \log \left(\frac{I}{I_0}\right)$. A barely audible sound has intensity $I_0=10^{-12} \frac{W}{ m ^2}$. Rounded to the nearest tenth of a decibel, what is the loudness, in decibels, of a musical group that plays with sound intensity of $I=6.7 \times 10^{-3} \frac{W}{ m ^2}$ ? A. 8.2 B. 98.3 C. 9.8 D. 76.5

[Solved] What is the sum of the geometric series? [tex]\sum_{n=1}^4(-2)(-3)^{n-1}[/tex]

[Solved] Rachel states that 5.5 is an integer because it is negative. Why accept 4.0, but not 5.5?

[Solved] The town librarian bought a combination of new-release movies on DVD for $20 and classic movies on DVD for $8. Let [tex]$x$[/tex] represent the number of new releases, and let [tex]$y$[/tex] represent the number of classics. If the librarian had a budget of $500 and wanted to purchase as many DVDs as possible, which values of [tex]$x$[/tex] and [tex]$y$[/tex] could represent the number of new-release and classic movies bought? [tex]$x=8, y=45$[/tex] [tex]$x=16, y=22$[/tex] [tex]$x=10, y=22$[/tex] [tex]$x=18, y=18$[/tex]

[Solved] Xander started doing his homework at 3:45 PM, and he finished at 5:30 PM. How many hours and minutes did it take him to complete his homework? A. 1 hour and 15 minutes B. 1 hour and 45 minutes C. 2 hours and 15 minutes D. 1 hour and 30 minutes

[Solved] Solve $\frac{1}{2}+\frac{1}{2 x}=\frac{x^2-7 x+10}{4 x}$ by rewriting the equation as a proportion. Which proportion is equivalent to the original equation? $\frac{x+2}{2 x}=\frac{x^2-7 x+10}{4 x}$ $\frac{x-1}{2 x}=\frac{x^2-7 x+10}{4 x}$ $\frac{x+1}{2 x}=\frac{x^2-7 x+10}{4 x}$ Name the true solution(s) to the equation. Name the extraneous solution(s) to the equation.

[Solved] 5. Simplify [tex]\frac{b^{12}}{b^5}[/tex]. 6. Simplify [tex]\frac{5^5 \cdot 6^3 \cdot 8^{10}}{5^3 \cdot 6 \cdot 8^9}[/tex]. 7. A publisher sells [tex]$10^6$[/tex] copies of a new science fiction book and [tex]$10^3$[/tex] copies of a new mystery book. How many times as many science fiction books were sold than mystery books? 8. Simplify [tex]\frac{45 x^{15}}{9 x^{10}}[/tex]. 9. Simplify [tex]\frac{a^4 c^6}{a^2 c}[/tex].

[Solved] 0.624 hours = ? seconds. Report your answer without decimal places. Do NOT include the units.

[Solved] Dan drove 512 miles in 8 hours. What was his average speed for the trip?