A college chemistry instructor thinks the use of embedded tutors will improve the success rate in introductory chemistry courses. The passing rate for introductory chemistry is 75%. During one semester, 200 students were enrolled in introductory chemistry courses with an embedded tutor. Of these 200 students, 155 passed the course. a. What is p, the sample proportion of students who passed introductory chemistry? b. What is Po, the proportion of students who pass introductory chemistry if the null hypothesis is true? c. Find the value of the test statistic. Explain the test statistic in context.

Sofia spent an afternoon cleaning and organizing the stock room where she works. One third of the items she sorted were pants. 50% of the remainder were tops, and the rest were scarves. If there were 36 scarves, how many items did she sort in all? A) 72 B) 108 C) 116 D)216

The following recipe yields 100 servings: 20 cups flour, 14 cups sugar, 12.5 cups raisins, 6 pounds butter. How much of the raisins will you need if you decrease the recipe to yield 20 servings? A) 1 and 3/4 cups B) 2.5 cups O C) 3 cups plus 2 Tbsp. O D) 4 cups

Let f(x) represent the total number of items a subject has memorized r hours after being presented with a long list of items to learn. Psychologists refer to the graph of y = f(x) as a learning curve and to f'(x) as the learning rate. Suppose that the learning rate is 10. 1.2 f(r) = -0.06r2+ +1 a. Find an equation for the learning curve with nothing memorized at the beginning. 1 of

Each child in a class is at least 110 centimeters tall and at most 142 centimeters tall. How large must the class be in order to guarantee that there are at least 2 children whose heights (to the nearest centimeter) differ by at most 9 centimeters? O 5 0 6 O 3 O 33 32

Jorge gives 3 chocolate bars to his friends. He gives 1/12 of 1 chocolate bar to each friend.  How many friends does he give a piece of chocolate to? A) 4 B) 12 C)36 D) 48

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On the morning of January 1 the odometer on the county garbage truck read 117,332.2 miles. After the run was finished on January 31 the odometer read 121,299.1 miles. What was the average number olmlan driven each day during the month of January? (Assme the uck was used every day.) A) 128.0 miles B) 132,2 miles O C) 1,983.5 miles D) 3,966.9 miles

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2.) Karla earns $20.25 per hour, If she works for a total of 32 hours one week, how much would she earn for that week? A. $52.25 $640 $648 $6,480 В. C. D.