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Questions in Grade College

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

[Jawaban] $x^2+\frac{1}{2} x+$

[Jawaban] The quadratic function $y=-x^2+10 x-8$ models the height of a trestle on a bridge. The $x$-axis represents ground level. To find where the section of the bridge meets ground level, solve $0=-x^2+10 x-8$ Where does this section of the bridge meet ground level? Choose an equation that would be used to solve $0=-x^2+10 x-8$ $(x+25)^2=-8$ $(x-5)^2=17$ $(x-10)^2=25

[Jawaban] Model the mixed radical $2 \sqrt[3]{4}$ as an entire radical. Record the value of the radicand.

[Jawaban] Find the product. $-8 x^5 y^2 \cdot 6 x^2 y$ A. $-8 x^{10} y^2$ B. $-8 x^7 y^3$ C. $-48 x^7 y^3$ D. $-48 x^{10} y^2$

[Jawaban] What is the radius of a circle whose equation is $x^2+y^2-10 x+6 y+18=0$? A. 2 units B. 4 units C. 8 units D. 16 units

[Jawaban] Multiply these two fractions: $\frac{4}{3} \times \frac{5}{8}=?$

[Jawaban] Functions of the prefrontal cortex include: A. Learning and memory B. Emotion C. Audition, vision, touch, and taste D. Planning, prioritizing, and making choices

[Jawaban] The elements of a set may be sets themselves, as in {1, {1, 3}, {2}, 4}. Explain why the set {0} is not the same set as {{0}}. Choose the correct answer below. A. The set {0} is the set containing no elements, while {{0}} is a set containing a set 0. B. The set {0} is the set containing the empty set and the empty set is a set with no elements, while {{0}} is a set containing a set 0. C. The set {0} is the set containing the element, while {{0}} is a set containing the element 0. D. The set {0} is the set containing the empty set and the empty set is a set with no elements, while {{0}} is a set containing the element 0.

[Jawaban] Some researchers claim there is an association between owning a dog and developing a flea infestation at home. They took a random sample of people living in St Louis, Missouri, and recorded whether they had a dog and whether they had a flea infestation in their home. The results are shown in the following two-way relative frequency table. | | Has Flea Infestation | Does Not Have Flea Infestation | Row Totals | | :-------------------- | :------------------- | :----------------------------- | :--------- | | Does not have a dog | 0.015 | 0.652 | 0.667 | | Has one dog | 0.022 | 0.261 | 0.283 | | Has more than one dog | 0.032 | 0.019 | 0.050 | | Column Totals | 0.069 | 0.931 | 1 | What is the conditional relative frequency of having more than one dog, given there is a flea infestation? Round your answer to the nearest thousandths place.