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timothy villar

timothy v.

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Question 14 (8 points) An artifact was discovered by an archeologist, who intially estimated it to be about 1500 years old. Than, after carbon-14 analysis was completed, it was determined that the carbon-14 contained in the artifact decreased from 16 grams originally to 12 grams now, so that 75% of its original amount of carbon-14 remains. After the mathematical investigation was completed, this model was created: $P(t) = 16e^{-0.000121t}$, where P(t) is the amount of carbon-14 remaining after 't' years. What conclusion should be made about the age of the artifact? 1) The initial estimate by the archeologist was not correct; the artifact is about 25,000 years old. 2) The initial estimate by the archeologist was correct; the artifact is about 1500 years old. 3) The initial estimate by the archeologist was correct; the artifact is about 2300 years old. 4) The initial estimate by the archeologist was not correct; the artifact is about 2300 years old.

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6. Circle the correct electrophiles for EAS reactions. (6 points) $Cl-Cl-FeCl_3$ $HO$

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The value of y is directly proportional to the value of x. When x = (3)/(4) y =56(1)/(4) But, what is the value of y when x = (1)/(2)?

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Question 36 Any event that increases the U.S. demand for euros should result in a(n) ______ in the value of the euro with respect to ______, other things being equal. increase; U.S. dollar increase; nondollar currencies decrease; nondollar currencies decrease; U.S. dollar 2 pts

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What are the structures that make up a nucleotide, the monomer of nucleic acids?

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Suppose G-pod manufactures 100 of their new phones, G-Phone. Because the G-Phone is new to the cell phone market, there is an estimated 15 G-Phones that are defective out of the 100 manufactured. O.G., the creator of G-Phone, decides to test three out of the hundred phones. What is the probability at least one G-Phone is defective?

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How does IT infrastructure fit into the broader scope of enterprise architecture? IT infrastructure is the sole focus of enterprise architecture. IT infrastructure is an entirely separate field from enterprise architecture. IT infrastructure is one of the key architectural domains within enterprise architecture. IT infrastructure is primarily concerned with cybersecurity.

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Find all complex cube roots of 8. In other words, find all complex solutions of $x^3 = 8$.

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11. Which of the following are second-order linear homogeneous recurrence relations with constant coefficients? There may be more than one. (a) $a_k = 2a_{k-1} - 5a_{k-2}$ (b) $d_k = 3d_{k-1} + d_{k-2}$ (c) $q_k = q_{k-1} + 3q_{k-2} - 10$ (d) $w_k = 10w_{k-2}$ (e) $b_k = b_{k-1} + kb_{k-2}$ (f) $g_k = 3g_{k-1} - g_{k-2}$

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3.23. The feed to an ammonia synthesis reactor contains 25 mole% nitrogen and the balance hydrogen. The flow rate of the stream is 3000 kg/h. Calculate the rate of flow of nitrogen into the reactor in kg/h. (Suggestion: First calculate the average molecular weight of the mixture.)

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