A+ Answers of the following Questions

1. Express the number 0.000724 in scientific notation (Use the multiplication symbol in the matt palette as needed)

2. A mountain is 16,026 feet above sea level. A valley is 113 feet above sea level. What is the difference in elevation between the mountain and the valley?

3. On three consecutive passes, a football team gains 10 yards, loses 23 yards, and gains 21 yards. What number represent the total net yardage?

1. Indicate whether the given processes are commutative Putting sugar and then ice cream in coffee; putting ice cream and then sugar in coffee.
Choose the correct answer below
A. Yes
B. No


2. Determine whether the activity can be used to illustrate the associative property Establishing a winner by matching finalist A, finalist B, and finalist C.
Choose the correct answer below.
A. Yes
B. No


3.Determine whether the activity can be used to illustrate the associative property Reading a novel, a story book, and a comic.
Choose the correct answer below.
A. Yes
B. No

1. Add. Simplify by collecting like radical term, if possible.
7√6 + 2√6
Type the exactly answer, using radicals as needed.

2. Determine whether the activity can be used to illustrate the associative property
Establishing a winner by matching finalist A, finalist B, and finalist C.
Choose the correct answer below.
A. Yes
B. No

3. Express the number 0.000724 in scientific notation (Use the multiplication symbol in the matt palette as needed)

1) A multiple-choice test has 20 questions. There are four choices for each question. A student comes to class with four different colored balls of identical shape and size in her pocket. She has decided to draw one ball from her pocket per question and allow the color of the ball to select the answer for each question. What type of probability distribution can be used to figure out her chance of getting 10 questions right?
A. Hypergeometric 
B. Poisson 
C. Normal 
D. Binomial 



2) Which of the following cannot generate a Poisson distribution?
A. The number of people at a movie theatre on Friday evening 
B. The number of customers arriving at an automatic teller machine (ATM) in a minute 
C. The number of defects in a new automobile 
D. The number of goals in the World Cup soccer game 

3) Which of the following is a characteristic of every binomial distribution?
A. Each outcome is dependent on the previous outcome. 
B. The probability of success increases from trial to trial. 
C. Each outcome is mutually exclusive. 
D. The outcome of the trial depends on the number of trials. 

1) The average qualifying speed for a championship NASCAR® race is 145.65 mph and the standard deviation is 9.45 mph. Only drivers who obtain z-scores greater than 1.2 will qualify for the race. If the speeds are normally distributed, what minimum speed must be clocked to compete for the trophy?
A. 146.9 mph 
B. 155.2 mph 
C. 157.0 mph 
D. 174.8 mph 



2) Trudy Jones recently completed her certification examination and learned that her z-score was -2.5. The examining board also informed her that a failure to pass would equal all scores that were one or more standard deviations below the mean and that those with scores higher than two standard deviations above the mean would receive a special commendation award. Trudy can conclude that she
A. failed the exam 
B. needs more data to determine if she passed the exam 
C. passed the exam and will receive a special commendation award 
D. passed the exam, but no commendation award is forthcoming 



3) The use of the student’s distribution requires which of the following assumptions?
A. The sample size is greater than 30. 
B. The population variance is known. 
C. The population is normal. 
D. The sample is drawn from a positively skewed distribution.