Chemistry
Elements with an even number of protons and neutrons A. never undergo alpha decay emission. B. have a single magic number of protons or neutrons C. always have a proton-to-neutron ratio of about one D. are usually stable E. are usually unstable
Chemistry
Naturally occurring boron is 80.20% boron-11 (of atomic mass 11.01 amu) and 19.80% of some other isotope form of boron. What must be the atomic mass of this second isotope in order to account for the 10.81 amu average atomic mass of boron? A. 10.99 amu B. 11.00 amu C. None of ...
Math
Find two quadratic functions, one that opens upward and one that opens downward, whose graphs have the given x-intercepts. (-3, 0), (-1/2, 0)
Math
Write the standard form of the quadratic function that has the indicated vertex and whose graph passes through the given point. Vertex: (-2, 5) Point: (0, 9)
Grammer
Is this grammatically correct? However, through influence by Lord Henry Wotton with his words, “Don’t squander the gold of your days, listening to the tedious, trying to improve the hopeless failure, or giving away your life to the ignorant, the common, and the vulga...
Grammer
Is this sentence grammatically correct? In the novel, Picture of Dorian Gray, by Oscar Wilde, the character Dorian Gray conveys the idea that influence eventually forces people to become another person and make decisions that are aberrations.
Pre-Calculus
I need help sketching the graph of a piecewise function. f(x) = { x² if |x|≤1, -x² if |x|>1
history
He vowed to punish all countries sponsoring terrorism
Pre-Calculus
How do I find the minimum or maximum of this y = 2x³ + 3x² - 12x? It makes 2 curves.
Pre-Calculus
Determine the open intervals on which the function is increasing, decreasing, or constant. f(x) = 3 f(x) = x^(2/3) f(x) = -x^(3/4)
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