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One of the fourth roots of -81 is $-3e^{\frac{\pi}{4}i}$ Select one: True False

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2.28. A company enters into a short futures contract to sell 5,000 bushels of wheat for 450 cents per bushel. The initial margin is $3,000 and the maintenance margin is $2,000. What price change would lead to a margin call? Under what circumstances could $1,500 be withdrawn from the margin account? 2.29. Suppose that there are no storage costs for crude oil and the interest rate for borrowing or lending is 5% per annum. How could you make money if the June and December futures contracts for a particular year trade at $60 and $66, respectively.

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Guide An Olympic sprinter readies for a race. After the sound of the starting gun, he propels himself forward from the starting block and immediately grimaces in pain, grabbing for the back of his begins noticing extensive bruising on the back of his thigh extending into the back of the knee. He now has difficulty rising from a seated position and flexing his knee. Bending at the waist muscle is likely injured? Multiple Choice Gluteus maximus Popliteus Biceps femoris Gastrocnemius Iliopsoas

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Which of the following is true of working memory? Multiple Choice Individual differences in working memory capacity have so far only been linked to genetic inheritance. Capacity for working memory does not directly affect academic success. Up to 25 percent of school-age children suffer from poor working memory. Training programs can improve working memory.

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1. Photoelectron spectroscopy (PES) is a technique related to the photoelectric effect. In PES, radiation is directed at an atom or molecule, and if the radiation has sufficient energy then electrons are ejected from the valence shell of the atom or molecule. The kinetic energy of the ejected electron is then measured. The minimum energy of radiation required to eject electrons is the ionization energy (IE) for the atom or molecule. Because the energy of the incoming photon is known and the kinetic energy of the outgoing electron is measured, IE can be deduced from the fact that the total energy is conserved, as expressed by the relationship: $hv = IE + \frac{1}{2}mv^2$. Use this relation to calculate the IE of a rubidium atom, given that radiation of wavelength 58.4 nm produces electrons with a speed of 2450 km/s.

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States that the more pleasure we get from a product, the higher the price we're willing to pay for it.

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A uniform ladder of length 5m is placed against the wall as shown in the figure. If the coefficient of friction \mu is the same for both the walls, what is the minimum value of \mu for it not to slip ?

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8. A car is driven along a curve of minimum radius R=108m. The static friction coefficient between its wheels and road is $\mu_s=0.8$. (a) Calculate the maximum speed at which the car can be driven along the curve without skidding. (b) For this value of the car's speed, calculate the angular speed $\omega$ at which the velocity vector is turning, in rad/s and $^{\circ}/s$.

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Question 1 3 pts Two balanced and fair dice are rolled. One is six-sided and the other is eight-sided. What is the probability of rolling a sum of 11? Submit the answer as a simplified fraction. The format that Canvas accepts is very specific. Use the forward slash (/) to separate the numerator from the denominator without spaces before or after. For example, three- fourths should be submitted as 3/4.

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Solve for w: 4(x-2)-1=-2(-2x+3)-9x. Simplify your answer as much as possible.

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victor manuel m.