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Questions in Grade College

[Done] A sample of tin ($Cp = 0.227 J / g \cdot{ }^{\circ} C$) is placed in a freezer. Its temperature decreases from $15.0^{\circ} C$ to $-10.0^{\circ} C$ as it releases 543 J of energy. What is the mass of the sample? Round your answer to three significant figures. Use the formula $q=m C_y \Delta T$. $\square$ g

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

[Done] To convert 3 square feet to square centimeters, multiply 3 by $9.29 \times 10^{-2}$ True False

[Done] Use synthetic division to find the quotient and remainder when $-x^3+4 x^2-8 x+2$ is divided by $x-2$ by completing the parts below. (a) Complete this synthetic division table. 2) $\begin{array}{llll}-1 & 4 & -8 & 2\end{array}$ $\square$ $\square$ $\square$ $\square$ $\square

[Done] (b) An object is set 20 cm in front of a lens, and a real, inverted, magnified image is formed at a great distance. State the type of lens used and determine the value of the focal length.

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

[Done] Jace gathered the data in the table. He found the approximate line of best fit to be [tex]$y=-0.7 x+2.36$[/tex]. | x | y | |---|---| | 0 | 3 | | 1 | 1 | | 4 | 0 | | 5 | -2 | | 7 | -2 | What is the residual value when [tex]$x=5$[/tex]?

[Done] One important reason to study government is because you can identify and examine how government operates, and how it influences your life. True or False

[Done] Until spun off in 2007, Kraft was part of Altria Group, Inc. Kraft had its own management team, mission statement, and target markets different from Altria. Kraft was a Select one: A. product market niche B. diversified division C. heterogeneous element D. strategic alliance E. strategic business unit of Altria.

[Done] What is the formula for the expected number of successes in a binomial experiment with $n$ trials and probability of success p? Choose the correct forumla below. A. $E(X)=\sqrt{n p(1-p)}$ B. $E(X)=p^n$ C. $E(X)=n p$ D. $E(X)=(1-p)^n(1-p)^n$