請問這題怎麼解，感謝🙏

NET POPULATION GROWTH A study indicates that x months from now, the population of a certain town will be increasing at the rate of 10 + 2Vx people per month. By how much will the population increase over the next 9 months?

SCENARIO 8-3 To become an actuary, it is necessary to pass a series of 10 exams, including the most important one, an exam in probability... 繼續閱讀

請問學過測驗學或英文很強的大神，我用紫色畫起來的這段話該怎麼翻比較正確

110 95 63 Performance Are Motor Concepts Language Total ite socioeco indings n these TAL-3 itely v eads 89 104 Self-Help 77 88 Social-emotional Self-Help TAL reate esti ifies ess: nor wh 65 Temir Focial-emotional acc ch "F te er 0 H-1510-09 * 3. 5 PAPER+COPY+FAX 雙頭螢光筆 as the Early Screening Profiles, Differential Abilities Scale, and Peabody Picture Vocabulary Test-IV. A recent study favorably evaluates the con struct validity of the DIAL-3 through confirmatory factor analysis (Assel & Anthony, 2009). As noted the instrument was designed to screen for devel opmental delays in three domains: motor abilities, conceptual knowledge, and language competence. An essential feature of the test is that separate scores are reported for each domain. These domains and the 74 fubtests comprising them were rationally precon- derved by the test authors. An important question is whether the 21 subtests “hang together” statistically in a manner that supports the rational grouping into the three domains provided by the test developers, In other words, do the three domains possess a latent reality, or are they merely figments of the imagina- tions of the test developers? Using test results for 1,560 children ages 3 to 6, Assel and Anthony (2009) found an excellent fit between the three domains tra- ditionally reported on the DIAL-3 and three empiri- cally derived domains found through factor analysis, which supports the construct validity of the test. However, these authors did note that Articulation subtest was a poor index of language compe Cotchine subteet

求救 統計 #8 （可支薪）

8. The NBI data were analyzed and the results made available at the FHWA Web site. Using the FHWA inspection ratings, each of the 608,272 highway bridges in the US was categorized as structural deficient, functionally obsolete, or safe. About 13.5% of the bridges were found to be structural deficient, while 3.5% were functionally obsolete. a. What is the variable of interest to the researchers? b. Is the variable of part a quantitative or qualitative? c. Is the data set analyzed a population or a sample? Explain. d. How did the NBI obtain the data for the study?

急 求救統計 #6 （可支薪）

6.The National Science Foundation (NSF) sponsored a study on girls participation in informal science, technology, engineering, or mathematics (STEM) programs. The results of the study were published in Cascading Influences: Long-Term Impacts of Informal STEM Experiences for Girls (March 2013). The researchers sampled 174 young women who recently participated in a STEM program. They used a pie chart to describe the geographic location (urban, suburban, or rural) of the STEM programs attended. Of the 174 participants, 107 were in urban areas, 57 in suburban areas, and 10 in rural areas. a. Determine the proportion of STEM participants from urban areas. b.Determine the proportion of STEM participants from suburban areas. c.Determine the proportion of STEM participants from rural areas. d. Multiply each proportion in parts a-c by 360 to determine the pie slice size (in degrees) for each location. e.Use the results, part d, to construct a pie chart for geographic location of STEM participants. f.Interpret the pie slice for urban areas. g.Convert the pie chart into a bar graph. Which, in your opinion, is more informative?

急！求救 #6 8 9 如果需要酬勞可私下談 （ex.$70題）

pie participation in informal 6.The National Science Foundation (NSF) sponsored a study on girls' science, technology, engineering, or mathematics (STEM) programs. The results of the study were published in Cascading Influences: Long-Term Impacts of Informal STEM Experiences for Girls (March 2013). The researchers sampled 174 young women who recently participated in a STEM program. They used a pie chart to describe the geographic location (urban, suburban, or rural) of the STEM programs attended. Of the 174 participants, 107 were in urban areas, 57 in suburban areas, and 10 in rural areas. a.Determine the proportion of STEM participants from urban areas. b.Determine the proportion of STEM participants from suburban areas. c.Determine the proportion of STEM participants from rural areas. d. Multiply each proportion in parts a-c by 360 to determine the pie slice size (in degrees) for each location. e.Use the results, part d, to construct a pie chart for geographic location of STEM participants. f.Interpret the pie slice for urban areas. g.Convert the pie chart into a bar graph. Which, in your opinion, is more informative? 7. All high way bridges in the US are inspected periodically for structural deficiency by the FHWA. Data from the FHWA inspections are compiled into the National Bridge Inventory (NBI). Classify each variable below as quantitative or qualitative. a. Length of maximum span (feet). b. Number of vehicle lanes. c. Toll bridge (yes or no). d. Average daily traffic. e. Condition of deck (good, fair, or poor). f. Bypass or detour length (miles). g. Route type (interstate, U.S., state, county, or city) 8. The NBI data were analyzed and the results made available at the FHWA Web site. Using the FHWA inspection ratings, each of the 608,272 highway bridges in the US was categorized as structural deficient, functionally obsolete, or safe. About 13.5% of the bridges were found to be structural deficient, while 3.5% were functionally obsolete. a. What is the variable of interest to the researchers? b. Is the variable of part a quantitative or qualitative? c. Is the data set analyzed a population or a sample? Explain. d. How did the NBI obtain the data for the study?

求題目C🙏

he Secant line PO jpo 全 slope of tangent line GZ+ 全 bs 二Instantaneous velocity i i $ which is the same as the average velocity over the time interval [lg,d 十 四. Therefore 7 e the velocity at time # 三 d (the limit of these average velocities as娘 approaches 0) must 7 [be equal to the slope of the tangent line at (the limit of the slopes of the secant lines). Examples 1 and 2 show that in order to Solve tangent and velocity problems we must be able to find limits. After Studying methods for computing limits in the next four sec- tions, we Will return to the problems of finding tangents and velocities in Chapter 2 FIGURE 4 kk 1.4 EXERCISES , 1. ,A tank holds 1000 liters of water, which drains from the (a) IPis the point (15, 250) on the graph of V, find the bottom of the tank in half an hour. The values in the table slopes of the secant lines PO when O is the point on the show the volume / of water in the tank (in liters) graph_ with 二5, 10, 20,25,and 30. (b) .Estimate the slope ofthe tangent line 午 吃by averaging after 7 minutes- the slopes of two secant lines. | fr(min) S$ 2 30 (c) Use agraph of the function to estimate the slope of the tangent line at P. (This slope Tepresents the rate at which | YOD 28 必 the Water is 1s siowing, from the tank after 15 minutes.)

1.7 不懂為什麼不是description statistics 是因為後面的change 有經過計算嗎

說 a.。 Opservationaj Study p. Designed experiment 1.6 Fi im the following blank: veal only asSociatior 3 : 1, Whereas 1 : aS de sd experiments can help ee de Signed experimenmt Ca k Observational Studies can Te- Applying the Concepts and skills 7y? 乜AVe7ce7'yec'y 了有 C/qQsSz7 cogce7 5 。 707 7 5/7/cs 5 27儿er Zesc77- ZUe O7 7727e7e72777. 二\ 了 7 yozr yye7s, 人執 4 ata from a sample of Americans ylelded te following &Stimates of average TV Viewing time per month for 引! Americans 2years old and older. The times are in hours and minutes; Q1 stands for first quarter. [SOURCE: 7/iz Cyoss-7P7d//o7gj 和ez2oz7z, Quarter 1, 2011. Published by The Nielsen Company, 1.7 TV Yiewing Times, @ 2011. _Tmferemti A 一cc二 生玖 AA二和多吃ttOCG Yiewing method Q12011|Q12010|Change (%) Watching TV in the home 說3 Watching timeshifted TV 1人 DVR plJayback 各 Using 了e Internet on a CoInputer 一1.4 Watching video on the Jnternet 34.5 Mobile subscribers watching 20.0 Video on amobile phone ].8 Professional Athlete Salaries. From the Sfgfsfcd/ Asfrdc/ 9 加8 EE 乃e Cuzreg Sogfes and the article “Average Salarles lm the NBA,N Ibutor 人 i blished on the Yahoo! Contm: MJPB and NHL by J 、Do is 和 還 1.10 drui 六/r yea ent av:

7,8 求解🙏

7. Maimonides, a twelfth-century scHioldr,、 sald,““TWwenty- five children may be put in the charge ot one teacher. 上 the number in the class exceeds twenty-five but 1s not more than forty, he should have an ass1stant to help with the instruction. IF there are more than forty, two teachers must be appointed””ISrael follows Maimonides's rule in deter- mining the number of teachers for each class. How could you use Maimonides sfule as a natural cxperiment to Study the effect_ of teacher-student ratios on student achievement? 8..Oregon expanded its Medicald coverage in _2008. Roughly 90,000 people applied but the state had funds to cover only an additional 30,000 people (Who were tfan- domly chosen from the total applicant pool of 90,000). How could you use the Oregon experlence to esStlmate the impact of increased access to healthcare on health Outcomes?

有誰可以幫我解這兩題

炎期中考 2020.05.06 Organic synthetic strategies 1. Starting with benzene and using any other reagents ofyour choice 凋 synthesis for each ofthe following compounds. (16%) 今蕊 闊 武包 養 勇 os?2葉渦。 了0 xy 紀 (a) No @ 3 2. Aminotetralins are aclass ofcompounds currently being studied for their promise as antidepressant drugs. The following reaction was employed during amechanistie study associated with asynthetic route for preparing aminotetralin drugs (J- Org. Chem. 2012, 77, 5503-5514). Propose a plausible mechanism for this 人 晤飲 人一就各虱生 CHa CHs CI O Br Br