請問e小題怎麼算，謝謝🙏

a POPULATION GROWTH It is estimated that 1 years from now, the population of a certain 6 suburban community will be P(1) = 20 - t + 1 thousand inst . a. Derive a formula for the rate at which the population will be changing with respect to time t years from now. b. At what rate will the population be growing 1 year from now? c. By how much will the population actually increase during the second year? d. At what rate will the population be growing 9 years from now? e. What will happen to the rate of population growth in the long run?

請問35、36怎麼解，希望有算式✍🏻，感謝！

b. What is the rate of change of the total cost when the level of production is ten surfboards a day? 35. EFFECT OF ADVERTISING ON PROFIT The quarterly profit (in thousands of dollars) of Cunningham Realty is given by x in = 3.5, 3. alt of P(x) = -*** + 7x + 30 = -ered en by time = - vhen 1 P( -x2 + (0 < x < 50) 3 bos where x (in thousands of dollars) is the amount of money Cunningham spends on advertising per quarter. a. Find P'(x). b. What is the rate of change of Cunningham's quarterly profit if the amount it spends on advertising is $10,000/quarter (x = 10) and $30,000/quarter (x = 30)? 36. DEMAND FOR TENTS The demand function for Sportsman 5 X 7 tents is given by p = f(x) = -0.1x2 – x + 40 where p is measured in dollars and x is measured in units of a thousand. a. Find the average rate of change in the unit price of a tent if the quantity demanded is between 5000 and 5050 tents; between 5000 and 5010 tents. b. What is the rate of change of the unit price if the quan- tity demanded is 5000? t (b). = own at its 2. time s the

可以幫忙看答案是否有誤嗎？謝謝

u. WUP 3. Tablet PCs: Cost, CPU, and Operating System. Refer to Table 1.6. ratio a. What is the average cost for the tablets? 587.9 b. Compare the average cost of tablets with a Windows operating system to the (負銀系) average cost of tablets with an Android operating system. Windows : 133.2, Android: 438.5 c. What percentage of tablets use a CPU manufactured by TI OMAP? 70% d. What percentage of tablets use an Android operating system? 40%

一直卡住算不出來 求詳解 謝謝🙏

1. A building locates at x=dſ with a height of h as shown in the right figure. A cannon at origin fires a bullet to bomb the roof of the building, please find out: (a) what is the initial velocity and angle should be to complete this mission? (b) how much time will it take to hit the target? (c) how height the bullet can reach? 2. Similar to the problem #1, now there is a mountain with a height of 2h sitting at d/2. The mission is the same, 2h T firing a cannon to high the roof of the building. Please/10 find out: (a) what is the initial velocity and angle should be to complete this mission by flying the bullet over the mountain? (b) how much time will it take to hit the target? (c) how height the bullet can reach?

［計算機組織］ 請問這題的 b. 小題 不同的 processor 不是影響 CPI 的值嗎 為什麼可以拿 a. 算出來的 CPI 直接套在這題？

1.7 [15] Compilers can have a profound impact on the performance of an application. Assume that for a program, compiler A results in a dynamic instruction count of 1.0E9 and has an execution time of 1.1 s, while compiler B results in a dynamic instruction count of 1.2E9 and an execution time of 1.5 s. a. Find the average CPI for each program given that the processor has a clock cycle time of 1 ns. CPI = cycles per instruction 1.1 x 10 cycles for 1.0 x 10° instructions => CPL = 1.1 1.5 X 109 cycles for 1.2 x 109 instructions => CPI = 1.25 b. Assume the compiled programs run on two different processors. If the execution times on the two processors are the same, how much faster is the clock of the processor running compiler A's code versus the clock of the processor running compiler B's code? Execution time = CPI x IC x Cycle Time CPIA X ICA X CTP1 = CP1g x IC3 x CT22 CT P:/CTP2 = (CPIE x ICB)/(CPIA X ICA) = (1.25 X 1.2 x 10°)/(1.1. X 1.0 x 10°) = 1.36 Cycle time P1 = 1.36 x Cycle time P2 => P1 is 36% slower than P2

求解法 謝謝 （普通物理）

1. Consider a particle moving with the acceleration vs. time graph as in Fig. 1. a, and to are constants with unit in m/s2 and s. Assume the particle is at rest and at origin (L) at t = 0. (a) Find the velocity v(t) for each interval (i.e. 0<t< to, to <t< 2to, 2t, <t (b) Find the displacement x(t) of the particle for each interval. (c) What are the velocity and displacement of the particle at t = 3t0? Fig. 1 an 2ao w ao to to 8:03 来搜寻 co 33°C D

求解答案是否正確

Multiple-choice questions: (70 points) write the letter of statement that is not true: 1. A.B.U The Drude Model: (a) It is a classical approach using concepts from the kinetic theory of gases. (b) A relaxation-time approximation is used where the probability of collision is l/t. (c) No forces act on the electrons in between collisions. (d) It predicts accurately the electronic heat capacity of metals. 2. The Sommerfeld Model: (a) The crystal potential is replaced by an average Coulomb potential. (b) The separation of states is so close that a continuum model can be applied. (c) The electrons are highly localized due to a strong crystal potential. (Q) The energy of the highest occupied state at 0 K is the Fermi energy. 3. Density of states in k-space, N(k): (a) N(k) is determined by the boundary value conditions. (b) For lattices in any dimensions, N(k) is constant in k-space. (C) N(k) depends on the direction and magnitude of k. (d) It is directly proportional to the volume of the crystal. E影響, c 4. The Fermi surface of a metal: (a) is responsible for many of the transport properties of the metal, (b) depends on the nature of the chemical bonds, (c) is always a sphere, (d) can involve mixing of electron orbitals. ✓ 5. The conductivity of a material () increases with the mobility of its carriers, (b) increases with the density of carriers, (C) it is inversely proportional to the energy gap. cogu changes with temperature. 6. BID Plasmons: (a) They are an important characteristic of the Sommerfeld electron gas model. (b) Plasmons occur spontaneously in metals. (c) They are related to charge density oscillations. (d) The Plasmon energy is typically of the order of 10 eV. The Fermi energy Ef in intrinsic semiconductors 8) is usually close to y E, at OK (b) it ACiD. can increase or decrease with temperature depending on the ratio of hole and electron effective masses, (c) it represents the point at which the probability of occupation is 12, even though there may not been any states with that energy, (d) its value relative to the electronic bands must remain unaffected in the presence of defects or interfaces.

e.f.g這三題不知道要如何解釋，請各位大神幫忙解題謝謝

1-8. Consider two inertial reference frames. When an observer in each frame measures the following quantities, which measurements made by the two observers must yield the same re- sults? Explain your reason for each answer. (a) The distance between two events (6) The value of the mass of a proton (c) The speed of light (d) The time interval between two events (e) Newton's first law (f) The order of the elements in the periodic table (g) The value of the electron charge

請問第七題怎麼解

60 s, turn 90 20 km/h for 2.0 min, turn 90° to the point, (a) how far are you from your starting point, and what direction relative to your initial direction of travel are you? V During volcanic eruptions, chunks of solid rock can be blasted out of the volcano; these projectiles are called volcanic bombs. Figure 4-22 shows a cross section of Mt. Fuji, in Japan. (a) At what initial speed would a bomb have to be ejected, at angle 0o = 60.0° to the horizontal, from the vent at A in order to fall at the foot of the volcano at B, at vertical distance h = 2.60 km and horizontal distance d = 9.40 km? Ignore, for the moment, the effects of air on the bomb's travel. (b) What would be the time of flight? (c) Would the effect of the air increase or decrease your answer in (a)?onatlar slow orl w moito Movisio Olovo vibolov te tootsodio dos olvistatani se moltotib nur no vodo as vd botu 29 vd baidot otsi Nomstl moll bottom 12 A plane flies 5 then 1100 km sout) trip, what are the displacement, the velocity, and (e) is 13 An astronau of 4.5 m. (a) Wha eration has a ma minute are requ period of the m 14 A basebal mum height al after reaching that is 86.0 m (a) What may ball? (b) How the ball strike blitt 00 Troede Vibolov sister sam 12 d B 15 The ran also on the place to plac broad jump (where g= by how mu instead in 1 Figure 4-22 Problem 7. 8 Oasis A is 90 km due west of oasis B. A desert camel leaves A and takes 55 h to walk 75 km at 37° north of due east. Next it takes 45 h to walk 65 km due south. Then it rests for 5.0 h. What are the (G) magnitu Cia

怎麼求？

55. In a 400-m drag race, two cars start at the same time, and each maintains a constant acceleration. The winner's acceleration is 10 4.25 m/s2, and the winner reaches the finish line 248 ms before the loser does. By what distance is the loser behind when the winner reaches the finish line?