1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tiny-mole [99]
3 years ago
8

The average score on a standardized test is 500 points with a standard deviation of 50 points. What is the probability that a st

udent scores more than 400 on the standardized test?
Mathematics
1 answer:
Charra [1.4K]3 years ago
5 0
The average score is 500 points and the standard deviation is 50 points.Mean - 2 SD = 500 - 2 * 50 = 500 - 100 = 400It means that more than 400 on the standardized test is more than: Mean - 2 Standard deviations.For the Normal distribution: 100% - 2.5 % = 97.5% = 0.975.Answer: The probability that student scores more than 400 points is 0.975.  

You might be interested in
5. In your part-lime job selling kitchen knives, you have two different sets available.
Korvikt [17]

Answer: 8.75

Step-by-step explanation:

575 divided by 3 equals 175. Divided by 20 equals 8.75. Probably rounds up to 9 but i dont know.

6 0
2 years ago
It is fall and time for joseph to harvest his farm. He currently has 120 acres of wheat. With the help of his farm equipment he
salantis [7]
A. Roc= 14a/d (he can harvest 14 acres per day) so to get 120 acres of wheat he would have to harvest wheat for a little over 5 and a half days



4 0
3 years ago
Consider a Triangle ABC like the one below. Suppose that C = 98, A = 74, and b = 11 (figure is not drawn to scale.) solve the tr
Degger [83]

Answer:

A=73.8\°

B=8.2\°

c=76.3\ units

Step-by-step explanation:

step 1

Find the measure of side c

Applying the law of cosines

c^{2}= a^{2}+b^{2}-2(a)(b)cos(C)

substitute the given values

c^{2}= 74^{2}+11^{2}-2(74)(11)cos(98\°)

c^{2}=5,823.5738

c=76.3\ units

step 2

Find the measure of angle A

Applying the law of sine

\frac{a}{sin(A)}=\frac{c}{sin(C)}

substitute the given values

\frac{74}{sin(A)}=\frac{76.3}{sin(98\°)}

sin(A)=(74)sin(98\°)/76.3

A=arcsin((74)sin(98\°)/76.3)

A=73.8\°

step 3

Find the measure of angle B

we know that

The sum of the internal angles of a triangle must be equal to 180 degrees

so

A+B+C=180\°

substitute the given values

73.8\°+B+98\°=180\°

171.8\°+B=180\°

B=180\°-171.8\°=8.2\°

5 0
3 years ago
Factor as the product of two binomials.<br> 22 + 11x + 18
Dahasolnce [82]

Answer:

11x +40

Step-by-step explanation:

Add 22 and 18 and the result will be as above.

4 0
3 years ago
What is the radius of a circle whose equation is x2+y2−10x+6y+18=0?
Brums [2.3K]

Answer:

4

Step-by-step explanation:

center | (5, -3)

radius | 4

diameter | 8

area enclosed | 16 π≈50.2655

circumference | 8 π≈25.1327

5 0
3 years ago
Other questions:
  • Credit cards place a three digit security code on the back of cards. What is the probability that a code starts with the number
    10·1 answer
  • An isosceles trapezoid is a trapezoid with congruent legs. true or false?
    12·2 answers
  • If a buyer purchases 25% of a lot in the spring and then purchases 50% more later in the fall, what percentage of the lot is sti
    6·1 answer
  • If 2i + (x + yi) = 6, what is x + yi?<br><br> I know i ask alot but please help me solve this
    10·1 answer
  • If one leg of a right triangle measures 3 centimeters and the other leg measures 6 centimeters, what is the length of the hypote
    9·2 answers
  • Write “2/3x-1/3y=2” in standard form
    6·1 answer
  • Please help me urgently ❤️ Plz
    12·1 answer
  • Part 4. Find the missing sides for the 30 60 90 triangles. Please show work for each​
    5·2 answers
  • Set up a proportion to predict the outcome of the given event
    7·2 answers
  • Which equation is equivalent to<br> f(x) = 16x^4 – 81 = 0?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!