Ace - AI Tutor
Ask Our Educators
Textbooks
My Library
Flashcards
Scribe - AI Notes
Notes & Exams
Download App
thomas chaves

thomas c.

Divider

Questions asked

BEST MATCH

A certain region is, on average, hit by 5.75.7 hurricanes a year. Find the mean and variance of the random variable X representing the number of hurricanes per year to hit the region.

View Answer
divider
BEST MATCH

You are given a task to design and construct a DC electric arc furnace for smelting ilmenite concentrate pellets using coke as reductant, to produce high titanium slag, pig iron and gases. Furnace capacity = furnace feed rate =17123.29 kg/h. 1. Write balanced chemical reactions for the process. 2. Come up with compositions for all the inputs. 3. Do a complete mass balance, in logical order. Show all calculations. 4. Do energy/heat balance, in logical order. Show all calculations. 5. Show all calculations and dimensions for your furnace. (Tip: make your own assumptions where necessary)

View Answer
divider
BEST MATCH

The plant and equipment account in the records of a company for the year ended 31 December 20X6 is shown below. PLANT AND EQUIPMENT - COST \begin{tabular}{|c|c|c|c|} \hline 20X6 & \$ & 20X6 & \$ \\ \hline 1 Jan Balance b/d & 960,000 & & \\ \hline \multirow[t]{3}{*}{1 July Bank} & 48,000 & 30 Sept Transfer disposal account & 84,000 \\ \hline & & 31 Dec Balance c/d & 924,000 \\ \hline & 1,008,000 & & 1,008,000 \\ \hline \end{tabular} The company's policy is to charge depreciation on the straight line basis at 20\% per year, with proportionate depreciation in the years of purchase and sale. What should be the charge for depreciation in the company's statement of profit or loss for the year ended 31 December 20X6?

View Answer
divider
BEST MATCH

Merlie got pregnant at age 38. Due to her age, her obstetrician suggested genetic testing of the fetal cells to identify any issues. The results showed that the fetus had Down syndrome. What is the issue with Merlie’s fetus? Group of answer choices It is missing chromosome 21. It has an extra chromosome 21. It is missing chromosome 23. It has an extra chromosome 23.

View Answer
divider
BEST MATCH

A person can be sexually attracted to others based primarily on characteristics of femininity and masculinity and completely independent of their sex and or their gender. Group of answer choices True False

View Answer
divider
BEST MATCH

The table shows the outcome of rolling a number cube (labeled 1 through 6) 200 times. \begin{tabular}{|c|c|} \hline Number & Outcome \\ \hline 1 & 28 \\ \hline 2 & 30 \\ \hline 3 & 35 \\ \hline 4 & 33 \\ \hline 5 & 38 \\ \hline 6 & 36 \\ \hline \end{tabular} Based on the outcomes, enter the number of times the cube is expected to land on 1 if it is rolled 50 times.

View Answer
divider
BEST MATCH

Question 2 College of Arts and Sciences Department of Biological and Environmental Sciences In preparation for an environmental determination of lead (Pb) in soil, a standard reference material (SRM) was analyzed using the recommended laboratory method. The SRM is certified to contain 13.9 µg dL$^{-1}$ (micrograms per deciliter) of Pb. An environmental analyst obtained the following values for Pb in the SRM: 15.7, 16.2, 13.2, 14.8, and 15.1 µg dL$^{-1}$ [Mean = 15.0 and Standard deviation = 1.1]. Determine whether or not the analyst obtained a Pb concentration in the SRM that was significantly different from the certified value at the 95% confidence level.

View Answer
divider
BEST MATCH

x^2 + 5y^2 - 8z^2 = 0

View Answer
divider
BEST MATCH

4. The exact value of $\sin\left(-\frac{\pi}{6}\right) + \cos\left(\frac{7\pi}{4}\right)$ is: $\frac{\sqrt{2}+1}{2}$ $\frac{\sqrt{3}-\sqrt{2}}{2}$ $\frac{\sqrt{3}+\sqrt{2}}{2}$ $\frac{\sqrt{2}-1}{2}$

View Answer
divider
BEST MATCH

In 1980 the population of alligators in a particular region was estimated to be 1500. In 2007 the population had grown to an estimated 7000. Using the Malthusian law for population growth, estimate the alligator population in this region in the year 2020 The alligator population in this region in the year 2020 is estimated to be (Round to the nearest whole number as needed.)

View Answer
divider