The final scores of students in mathematics are distributed normally with a mean of 72 and a standard deviation of 10. What is the probability that a student’s score will be between 65 and 78?.
Answer:
0.8041
Explanation:
0.8041
We know that
μ=72 and σ=5
and P(65<X<78)
We can determine the Z value as (X-μ)/σ
P( 65<X<78 )=P( 65-72< X-μ<78-72)
P((65-72)/5 < Z < (78-72)/5)P((65−72)/5<Z<(78−72)/5)
P(65 < X < 78 )=P(-1.4 < Z < 1.2)P(65<X<78)=P(−1.4<Z<1.2)
To fine the Z values:
P (-1.4 < Z < 1.2 )=P ( Z < 1.2 )-P (Z < -1.4 )P(−1.4<Z<1.2)=P(Z<1.2)−P(Z<−1.4)
From the standard normal tables:
P (Z < 1.2 )=0.8849P(Z<1.2)=0.8849
to find P ( Z<-1.4)
P ( Z < -a)=1-P ( Z < a )P(Z<−a)=1−P(Z<a)
From the standard normal tables:
P ( Z < -1.4)=1-P ( Z < 1.4 )=1-0.9192=0.0808P(Z<−1.4)=1−P(Z<1.4)=1−0.9192=0.0808
Therefore
P(-1.4 < Z < 1.2 )=0.8041P(−1.4<Z<1.2)=0.8041
P (65 < X < 78)=0.8041P(65<X<78)=0.8041
The base of a pyramid has n sides.
Since it's wednesday, buy for less gives a 5% discount for purchases. The items in rhonda's cart total $53. 75. She needs to know the cost of the items with the discount. So, she multiplies 5% times $53. 75 and subtracts the amount from $53. 75. Which expression would give rhonda the same result in one step?.
.95(53.75)
i think that's it :)
Turkey sandwiches cost $2. 50 and veggie wraps cost $3. 50 at a snack stand. Ben has sold no more than $30 worth of turkey sandwiches and veggie wraps in the first hour of business. Let x represent the number of turkey sandwiches and y represent the number of veggie wraps. The inequality 2. 50x+3. 50y30 represents the food sales in the first hour. If ben has sold 4 veggie wraps, what is the maximum number of turkey sandwiches ben could have sold? 5 6 7 10.
Answer:
6
Explanation:
6-8x=7x-9x=36 i dont know the steps to solve
Answer:
sorry but i think this is mistake
Answer:sorry
Explanation:
In the figure below, what is the value of a +b?
Answer:
105
Explanation:
I got it right on the test.
Carmen buys 153 shares of Cawh Consolidated Banks, each of which pays a constant yearly dividend of $7. 14. After six years, how much has Carmen received in dividends? a. $5,783. 40 b. $1,820. 70 c. $1,092. 42 d. $6,554. 52.
Answer:
The answer is D
Explanation:
4. 3 code practice: question 1.
what is the question tho
When a cross is made and a trait disappears in the f1 generation, only to reappear in the f2, the trait is probably.
Which of the following is a result of gravity in relation to moving tectonic plates.
Answer:
Hello!!
Which of the following is a result of gravity in relation to moving tectonic plates?
A result of gravity in relation to moving tectonic plates is ridge push and slab pool.
Hope this helps!!
Why might you choose to filter a list or table instead of simply sorting it?.
There are 10 red marbles and 8 green marbles in a jar.
Answer: what's your question, Luis?
Explanation:
Answer:
feeling bad cuz they can't even reask the question since they've got 3 points you're in my prayers luis
The best way to safeguard your document is to save it.
Procter & gamble offers tide detergents, charmin bathroom tissue, crest toothpaste products, and pampers diapers, as well as a host of other household brands. These products all represent a.
Procter & gamble offers tide detergents, charmin bathroom tissue, crest toothpaste products, and pampers diapers, as well as a host of other household brands. Thus, these products all represent a: Product mix.
A product refers to any physical object or material that typically satisfy and meets the demands, needs or wants of customers.
Hence, a product comprises the finished goods that gives satisfaction to a customer's needs and wants.
A product mix is also referred to as product portfolio or product assortment and it can be defined as a complete set of products that are being offered by a business firm, for sale to consumers.
Some examples of the products in a product mix are:
Tide detergents.Charmin bathroom tissue.Crest toothpaste products.Pampers diapers.Read more: https://brainly.com/question/17151791
Read each detail from the assignment text. Then, identify whether the detail indicates that the author’s purpose is to inform, to entertain, or to persuade. "Many Hispanics spoke only Spanish, and most whites spoke only English. " "He knew he had the courage to blast through tacklers and the toughness to work all day in the beet fields, but this seemed harder. " "There were only two days before the next game. ".
Answer: m
Explanation: m
The first detail "Many Hispanics spoke only Spanish, and most whites spoke only English" indicates that the author's intention is to inform, as it provides factual information about language usage in a specific context.
Who is author?The term "author" usually refers to the person who wrote a book, an article, or another piece of writing. It can also be used to describe the creator of other types of works, such as music, art, or film.
The first detail "Many Hispanics spoke only Spanish, and most whites spoke only English" indicates that the author's intention is to inform, as it provides factual information about language usage in a specific context.
The second detail "He knew he had the courage to blast through tacklers and the toughness to work all day in the beetroot fields, but this seemed harder" indicates that the author's intention is to entertain, as it uses descriptive language to create a sense of drama and tension.
The third detail, "There were only two days until the next game," indicates that the author's intention is to inform, as it provides factual information relevant to a specific context.
Thus, these are the details that indicates that the author’s purpose is to inform, to entertain, or to persuade.
For more details regarding author, visit:
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#SPJ7
An object moves along a straight line so that at any time t, 0≤t≤9, its position is given by x(t)=7+6t−t2. For what value of t is the object at rest?.
We will see that for t = 3 seconds the object will be at rest.
When does an object is at rest?
We say that something is at rest if its velocity is equal to zero.
Here we know that the position equation of the object is:
x(t) = 7 + 6*t - t^2
To get the velocity, we need to differentiate with respect to the time, using the rule:
[tex]f(x) = a*x^n\\\\f'(x) = n*a*x^{n-1}[/tex]
We will get:
v(t) = 6 - 2*t
Now we just need to find the value of t such that the above equation is equal to zero:
0 = 6 - 2*t
2*t = 6
t = 6/2 = 3
Then for t = 3 seconds, the object will be at rest.
If you want to learn more about motion equations, you can read:
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Answer:3
t=
Explanation:
An object being at rest indicates the velocity is 0. Set the derivative of the equation equal to zero. (0=6-2t) Subtract 6 from both sides (-6=-2t) and then divide by negative 2 to get t=3, meaning the object is at rest at
1 mile 5280 feet
61 centimeters == 2 feet
Based on the information above, how many
centimeters are equivalent to 3 miles?
A) 161,040
B) 322,080
C) 183,120
D) 644,160
Answer:
B) 322,080
Explanation:
322,080÷61=5280
Which timeline shows the correct order of contributions made to the discovery of dna?.
Answer:
DNA was discovered in 1800, and then scientists studied DNA with X-Rays. After a while, scientists published a 3D model of DNA, and shortly after, scientists decoded DNA genes.
Answer:
B
Credit:
I got this answer from the other guy, just posting this answer for those who don't want to read
If (93 × p) + 84 = 8593 times p plus 84 equals 85, then p equals:.
The solutions of (93 × p) + 84 = 8593 times p plus 84 equals 85 yields p = 84/8500 or 1/8593.
We can write the equation as follows;
(93 × p) + 84 = (8593 × p) + 84 = 85
We can solve the equation in parts as follows;
(93 × p) + 84 = (8593 × p) + 84
93p + 84 = 8593p
93p - 8593p = -84
-8500p = -84
p = 84/8500
Also;
(8593 × p) + 84 = 85
8593p + 84 = 85
p = 85 - 84/8593
p = 1/8593
Hence p = 84/8500 or 1/8593
Learn more: https://brainly.com/question/2510654
Would you recommend living in a city or living in the desert?.
Answer: city because living in the desert might be hard to find food and you would overheat eventually.
Explanation: Hope this helps :)
A car travels the distance between logan airport and the town of framingham in 20 min. The logan express bus travels this distance in 30 min. After how long do the car and bus meet if they leave at the same time, and one travels from framingham to the airport while the other travels from the airport to framingham?.
The time the car and bus will meet if they leave at the same time, and one travels from Framingham to the airport while the other travels from the airport to Framingham is 12 minutes.
let
the distance between Logan airport and the town of Framingham = a
Car speed:
speed = distance / time
speed = a / 20
Logan express bus speed
speed = distance / time
speed = a / 30
let
the distance travelled by the car by the time they met = b
Then
the distance travelled by the bus the time they met = a - b
Therefore,
The time they met will be as follows:
speed = distance / time
time = distance / speed
b / a / 20 = a - b / a / 30
20b / a = 30(a - b) / a
cross multiply
20ab = 30(a - b)a
20ab = 30a²- 30ab
50ab = 30a²
5b = 3a
b = 3 / 5 a
Therefore,
b / a / 20 = 3 / 5 a / a / 20 = 3 / 5 a × 20 / a = 60a / 5a = 12 minutes
read more; https://brainly.com/question/2198209
Answer:
12 minutes
Explanation:
Ordinary table salt is composed of.
Mike traveled for 4 hours at a rate of 55 mph. How far did he travel?.
Answer:
pretty sure 220
Explanation:
distance = (4 hr)(55 mi/hr) = 220 miles
We flowers in the school garden when it started to rain.
This is the complete sentence:
We were planting flowers in the school garden when it started to rain.I was able to find the complete exercise with its options to choose from online, which are:
were planting plant are planting have planted"Were planting" is the only one that is gramatically correct to complete the sentence given, because the sentence says that we were doing something when something else happened, so you need to start with the past continuons.
Check more information in the following link https://brainly.com/question/25005984?referrer=searchResults
Paris drawing.
I made it
Answer: can you mark me as brainliest please
cool????...
Explanation:
amazinggggggggggggggggggggggggggggggggggggggggggggExplanation:
Consider this equation. 7. 8 2(0. 75m 0. 4) = -6. 4m 4(0. 5m - 0. 8) Mia solved the equation and determined that m = 2. Is she correct? She is incorrect because when substituting 2 for m the result was a true statement. She is incorrect because when substituting 2 for m the result was a false statement. She is correct because when substituting 2 for m the result was a true statement. She is correct because when substituting 2 for m the result was a false statement.
Answer:
675
Explanation:
Solve the equation. –3x 9 = –3(2x 3) 3(x – 4) 1 How many solutions does this equation have? one solution two solutions infinitely many solutions no solution.
Answer:
no solution
Explanation:
just took then assignment
Answer:
no soultion
Explanation:
A food worker at a catered event finds grilled shrimp.
Answer:
Cool
Explanation:
The man in the well passage how do the children respond to the mans initial cry for help
Answer:
by making their way to Arthur's place.
Did you experience spending more time to make a decision that greatly affects you or your future just like anton? share your experience.
Answer:
yes
Explanation:
this Anton is unknown but I could remember missing my peers at an event at the stadium
