1. When glucose and lactose are both present

a. the activator and repressor do not bing the DNA

b. the operon is not expressed

c. the operon is expressed

d. only the repressor binds the DNA

e. only the activator binds the DNA

f. the activator and repressor do not bind DNa

2. match the following

cAMP

lactose

A survey of nonprofit organizations showed that online fundraising has increased in the past year. Based on a random sample of 50 ​nonprofits, the mean​ one-time gift donation in the past year was ​$39​, with a standard deviation of ​$10. Complete parts a and b below. a. Construct a 90​% confidence interval estimate for the population​ one-time gift donation. nothingless than or equalsmuless than or equals nothing ​(Type integers or decimals rounded to two decimal places as​ needed.)

2. There is a 50% chance that you will study for the exam and earn the highest grade in the class, and a 75% chance that you will earn the highest grade in the class.

Q The probability that you will study for the exam given that you earn the highest grade in the class is:

3. Cast two dice (one red, and one green) and add the numbers facing up. Let

E: The green die shows 2 .
F: The sum is 5 .
P(E|F) =

  P(F|E) =

The following table summarizes the responses of a sample of 25 workers who were asked how many miles they had to travel to go to work.

Suppose you build a histogram with this information. Describe it

A. "A single peak, skewed to the left (left-skewed)."

B. "A single peak, skewed to the right (right-skewed)."

C. "Bimodal, skewed to the right (right-skewed)."

D. "Bimodal, skewed to the left (left-skewed)."

"The survival time of patients after a certain type of surgery has a skewed distribution to the right due to the presence of outliers. Consequently, which statement is more likely to be correct?"

A. Median (median)> range

B. Average (mean) <median (median)

C. Average (mean)> median (median)

D. None of the above.

A distribution will be skewed to the left (left-skewed) if

A. Median <mid axis (midhinge)

B. Medium> mid axis (midhinge)

C. Median = mid axis (midhinge)

D. None of the above.

"Since P (A) = 0.4, P (B) = 0.5 and P (A ∩B) = 0.05. Then:"

A. P (A∪B) = 0.80; P (A / B) = 0.1

B. P (A∪B) = 0.85; P (A / B) = 0.15

C. P (A∪B) = 0.85; P (A / B) = 0.10

D. None of the above.

The average of the exam of a class of 30 students was 75. The average of the exam for the 20 male students of that class was 70. Then the average of the exam for the 10 female students was:

A. 85

B. 80

C. 75

D. None of the above.

"Two events are complementary (that is, they are complements), yes"

A. The sum of your odds is equal to one.

B. The probability of your interception is equal to one.

C. They are two independent events with equal probabilities.

D. None of the above.

What probability function can be used to describe the number of damaged printers in a random sample of 12 printers taken from a shipment of 70 printers consisting of 6 damaged printers?

A. Poisson

B. Hypergeometric

C. Binomial

D. None of the above.

You have the following probability distribution of the random variable X:

The expected value of X is:

A. 175

B. 150

C. 205

D. None of the above.

The variable Z has a standard normal distribution. The probability P (0.71 <Z <1.43) is:

A. 0.1625

B. 0.92

C. 0.5

D. 0.485

"Suppose that X has a normal distribution with a mean μ = $ 64. Given that P (X> $ 75) = 0.2981, we can calculate that the standard deviation of X is approximately"

A. $ 20.75

B. $ 13.75

C. $ 5.83

D. $ 7.05

"In Quebec, 90% of the population is Catholic. In a random sample of 8 people find the probability that the sample contains at least five Catholics."

A. 0.005

B. 0.0331

C. 0.995

D. 0.9619

You received a high-yield savings account that contains $1,000,000. The account has a 7% annual interest rate and you want to take out a constant amount every year for 40 years.

1. How much would you be able to withdraw every year? Hint: the annual interest rate should be used as the discount rate in the finite time annuity formula.

2. Using Microsoft Excel, decompose your annual withdrawals into interest revenue and revenue earned from principal deduction (for example, at t=1, you get 7% x $1,000,000 in interest, and take the remaining amount from the principal – these together should equal the amount you determined in (1)). Graph interest revenue and principal revenue together, with time on the xaxis. Report the graph based on all 40 years, and only report the interest revenue and principal revenue numbers for the first 10 years.

3. Suppose you want to take out $100,000 per year. For how many years would you be able to make this exact withdrawal?

4. After your last exact withdrawal from (3), you decide to withdraw everything in your account one year later. How much money would you get from your final withdrawal?

How many 10 digit decimal numbers contain:

a-) exactly three 7’s ?

b-) at most two 7’s ?

c-) at least two 7’s ?

please explain when solving problems. thanks

1.) What does it mean when glassware is labelled “TD”? How is that different from “TC”?

2.) Pipets with multiple graduation marks are what type of pipet? Are they always TD or TC?

3.) Pipets with ONE marks are what type of pipet? Are they always TD or TC?

4.) (T / F) Quantitative analysis may be used to determine how many different compounds are in a sample. (Explain your answer.)

5.) Is acid/base titration a separation method? Why or why not?

6.) List and briefly explain three separation methods

7.) List the seven steps of chemical analysis as described in our text and briefly explain each one.

Birthday problem. Suppose that people enter a room one at a time. How people must enter until two share a birthday? Counterintuitively, after 23 people enter the room, there is approximately a 50–50 chance that two share a birthday. This phenomenon is known as the birthday problem or birthday paradox.

Write a program Birthday.java that takes two integer command-line arguments n and trials and performs the following experiment, trials times:

• Choose a birthday for the next person, uniformly at random between 0 and n−1.n−1.
• Have that person enter the room.
• If that person shares a birthday with someone else in the room, stop; otherwise repeat.

In each experiment, count the number of people that enter the room. Print a table that summarizes the results (the count i, the number of times that exactly i people enter the room, and the fraction of times that i or fewer people enter the room) for each possible value of i from 1 until the fraction reaches (or exceeds) 50%.

Submission. Submit a .zip file containing DiscreteDistribution.java, ThueMorse.java, Birthday.java, and Minesweeper.java. You may not call library functions except those in the java.lang (such as Integer.parseInt() and Math.sqrt()). Use only Java features that have already been introduced in the course (e.g., loops and arrays, but not functions).

C++

Instructions

A company hired 10 temporary workers who are paid hourly and you are given a data file that contains the last name of the employees, the number of hours each employee worked in a week, and the hourly pay rate of each employee. You are asked to write a program that computes each employee’s weekly pay and the average salary of all employees. The program then outputs the weekly pay of each employee, the average weekly pay, and the names of all the employees whose pay is greater than or equal to the average pay. If the number of hours worked in a week is more than 40, then the pay rate for the hours over 40 is 1.5 times the regular hourly rate.

Use two parallel arrays:

• a one-dimensional array to store the names of all the employees (Name)
• a two-dimensional array of 10 rows and 3 columns to store the number of hours an employee worked in a week (Hrs Worked), the hourly pay rate (Pay Rate), and the weekly pay (Salary).

Your program must contain at least the following functions:

• a function to read the data from the file into the arrays.
• a function to determine the weekly pay.
• a function to output each employee’s data.
• a function to output the average salary of all employees
• a function to output the names of all the employees whose pay is greater than or equal to the average weekly pay

A sample output is: