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
Amanda [17]
2 years ago
11

The scores on a standardized test are normally distributed with a mean of 80 and standard

Mathematics
1 answer:
blsea [12.9K]2 years ago
3 0

Answer:

84.5

Step-by-step explanation:

Given :

Mean μ = 80

Standard deviation, σ = 5

Z = number of standard deviations from the mean, Z = 0.9

Teat score, x

Using the Zscore formula :

Zscore = (x - μ) / σ

Plugging in our values :

0.9 = (x - 80) / 5

Cross multiply

0.9 * 5 = x - 80

4.5 = x - 80

4.5 + 80 = x

x = 84.5

Test score = 84.5

You might be interested in
In first half of a basketball game one team scored 45 points. This was 5/9 of their score for the whole game. How many points di
hammer [34]

Answer:

36

Step-by-step explanation:

45*(9/5)=81(The whole score)

81-45=36(the second half score)

5 0
2 years ago
Read 2 more answers
4. Solve the equation.
shusha [124]

Answer:

=1187n

Step-by-step explanation:

5n+1182n=?

=1187n

6 0
2 years ago
Subtract 6 from me then multiply by 2 if you subtract 40 then divide by 4 you get 8 what number I am
stellarik [79]

Answer:

42

Step-by-step explanation:

42-6 = 36

36*2 = 72

72-40 = 32

32/4 = 8

8 0
2 years ago
Which equation has an a-value of 1, a b-value of –3, and a c-value of –5?
ANTONII [103]

Answer:

answer is first option

{x}^{2}  -3x - 5 = 0

wherein, a = 1, b = -3, c = -5

8 0
3 years ago
Read 2 more answers
The amount, A, in milligrams, of radioactive material remaining in a container can be modeled by the exponential function A(t) =
lisov135 [29]

Answer: 4 years


Step-by-step explanation:

A(0) has to be amount at start. Assume that's 5mg

Then A(t) = 5×(0.5)^(0.25t) = 5×2^(-t/4),

(also known as 5 exp(-λ t) with λ = ln(2)/4, incidentally).


We need to such that A(t) = 2.5mg, or 2^(-t/4) is 1/2, which happens when -t/4 is -1, or t is 4.



4 0
3 years ago
Other questions:
  • Joanne slices a large banana bread into 10 pieces. There are 2 adults and 2 children who get a piece of banana bread. The rest o
    5·1 answer
  • Suppose you flip 3 quarters, one at a time. What is the probability that you will
    9·1 answer
  • Hello! I need help on this. Thanks! :)
    8·1 answer
  • Help me plz I need help it's due tomorrow what do I draw for the picture to
    14·2 answers
  • Evaluate: 2^-2 x (13x3)-5^3
    11·2 answers
  • What is the value of log625^5 converted to a fraction
    11·1 answer
  • Please help!<br><br> Thank you!
    5·1 answer
  • Anyone want to talk girls only(halljeanice1) Email only
    14·1 answer
  • Translate the following into an equation:
    5·1 answer
  • Please help! Due tonight thank you!
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!