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Questions in Grade High-school

[Done] You’re going to a movie with your friend, Usain. He tells you that he received a check from his grandparent for his birthday. He needs to cash the check for the movie ticket, but he doesn’t have a bank account. Where could Usain get cash for his check so he can buy his movie ticket?

[Done] Dirk and his friends set out to sea on their annual fishing trip. There is a proportional relationship between the time (in hours) Dirk and his friends spend sailing, x, and their distance from shore (in miles), y. Write an equation for the relationship between x and y. Simplify any fractions. y = kx

[Done] Show that: [tex]$2 \sin ^2\left(\frac{\pi}{4}-\frac{\theta}{2}\right)=1-\sin \theta$[/tex]

[Done] The aspects of a specific location that make people want to move away are called A. opportunities B. pull factors C. migrations D. push factors

[Done] Which is the exponential form of [tex]$\log _b 35=3$[/tex] ? [tex]$b^{35}=3$[/tex] [tex]$b^3=35$[/tex] [tex]$35^3=b$[/tex] [tex]$3^b=35$[/tex]

[Done] Find the sum and express it in simplest form. $\left(-5 x^3+6 x-4\right)+\left(-2 x^3+x\right)$

[Done] A copper rod that has a mass of 200.0 g has an initial temperature of [tex]$20.0^{\circ} C$[/tex] and is heated to [tex]$40.0^{\circ} C$[/tex]. If [tex]$1,540 J$[/tex] of heat are needed to heat the rod, what is the specific heat of copper? Use [tex]$q=m C_p \Delta T$[/tex]. A. [tex]$0.0130 J /( g { }^{\circ} C )$[/tex] B. [tex]$0.0649 J /( g { }^{\circ} C )$[/tex] C. [tex]$0.193 J /( g { }^{\circ} C )$[/tex] D. [tex]$0.385 J /( g { }^{\circ} C )$[/tex]

[Done] Protein synthesis in prokaryotes is much simpler and faster than it is in eukaryotes. Which of the following would you expect to contribute to faster protein synthesis in prokaryotes? A. mRNA does not have to cross a membrane. B. Prokaryotes need proteins more quickly than eukaryotes do. C. Prokaryotes use a simpler genetic code than eukaryotes do. D. DNA is translated directly into protein in prokaryotes.

[Done] An air show is scheduled for an airport located on a coordinate system measured in miles. The air traffic controllers have closed the airspace, modeled by a quadratic equation, to non-air show traffic. The boundary of the closed airspace starts at the vertex at $(10,6)$ and passes through the point $(12,7)$. A commuter jet has filed a flight plan that takes it along a linear path from $(-18,14)$ to $(16,-13)$. Which system of equations can be used to determine whether the commuter jet's flight path intersects the closed airspace? $\begin{array}{l} y=\frac{1}{4}(x-10)^2+6 \\ y=-\frac{27}{34} x-\frac{5}{17} \end{array}$ $\begin{array}{l} y=\frac{1}{4}(x-10)^2+6 \\ y=-2 x-22 \end{array}$ $\begin{array}{l} y=\frac{1}{4}(x-5)^2+10 \\ y=-\frac{1}{2} x+5 \end{array}$ $\begin{array}{l} y=\frac{1}{4}(x-5)^2+10 \\ y=-2 x-22 \end{array}$

[Done] 2. Major part of electric current in an intrinsic semiconductor is due to drift of (a) conduction-band electrons (b) valence-band electrons (c) conduction-band holes (d) valence-band holes (e) None of the above. 3. The rms value of current in a full-wave rectifier is given as (a) [tex]$I_m / \pi$[/tex] (b) [tex]$I_m / 2$[/tex] (c) [tex]$I_m / \sqrt{ } 2$[/tex] (d) [tex]$2 l_m / \pi$[/tex]