The Lewis Structure of PCl4-1 is shown below. Which answer choice best describes the type of octet around the central atom?  

The Lewis Structure of SOCl2 is shown below. Which answer choice best describes the type of octet around the central atom?  

A medical research team conducted a study to test the effect of a cholesterol reducing medication.  At the end of the study, the researcher found that of the 4700 people who took the medication, 301 died of heart disease.  Of the 4300 people who took a placebo, 357 died of heart disease.  At 0.05 significance level, can you conclude that the death rate is lower for those who took the medication than for those who took the placebo? The following hypotheses were set:

The heights of fully grown white oak trees are normally distributed with a mean of 90 feet and standard deviation of 3.5 feet.  A sample of 16 fully grown white oak trees is selected. Which of the following is true about the shape of the sampling distribution of the sample means?

An educator is interested to test whether the SAT preparatory course is effective in raising the SAT scores.  A simple random sample of 7 students took SAT, and their scores are recorded below.  The same students took SAT after the preparatory course.  At 5% significance level, is there an increase in SAT scores after the preparatory course?  Assume that both distributions of SAT scores before and after the preparatory course are normal.  Find the corresponding p-value (use a calculator)

Which of the following are suggested strategies for extra help?

Fill in the appropriate values (use numbers, not words) for each item about quizzes and tests: The quizzes and tests will be open (available) for [time] hours. (This is not the length of time you have to take the quizzes or tests, but the total amount of time the quizzes/tests will be available.) The number of scheduled quizzes is [quizno]. Each of the quizzes will be worth a total of [quizpt] points. Each of the tests will be worth a total of [testpt] points.You will have [testtime] hours to complete a test.Tests will be proctored using [proctor]. (Write the name of the proctoring service, as it appears in the syllabus)

Elon Musk’s career illustrates both serial and portfolio entrepreneurship. Whereas serial entrepreneurs _______, portfolio entrepreneurs _______.

Gulati (2019) argued that startups often lose some of their core features and struggle when they bring in external investors, hire professional managers, and establish more formal structures.

The experiences of Airbnb, Etsy, and Uber illustrate creative destruction. Which of the following is true of creative destruction?