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
____ [38]
3 years ago
5

A test consists of 490 true or false questions. If the student guesses on each question, what is the standard deviation of the n

umber of correct answers? Round the answer to the nearest hundredth.
Mathematics
1 answer:
monitta3 years ago
3 0
I believe the answer is 1.
You might be interested in
Triangle L M Q is cut by perpendicular bisector L N. Angle N L Q is 32 degrees and angle L M N is 58 degrees.
Serga [27]

Answer:

Yes

Step-by-step explanation:

ΔMNL ≅ ΔQNL  by ASA or AAS

by ASA

Proof:

∠ LNM = ∠LNQ    =90

LN = LN   {Common}

∠MLN = ∠QLN     {LN bisects ∠ L}

By AAS

∠Q + ∠QLN + ∠LNQ = 180  {Angle sum property of triangle}

∠Q + 32 + 90 = 180

∠Q  + 122 = 180

∠Q = 180 -122 =

∠Q = 58

∠Q = ∠M

∠MNL =∠QNL = 90

LN = LN {common side}

8 0
3 years ago
A circular pond 20m in diameter is surrounded by a gravel path 5m wide. The path is to be replaced by a brick walk costing $30 p
Bezzdna [24]
Here, check this out.

8 0
3 years ago
Read 2 more answers
Please help me AAAAAA
bezimeni [28]

Answer:

45

Step-by-step explanation:

AEF is a similar triangle to ABC. that means it has the same angles, and the sides (and all other lines in the triangle) are scaled from the ABC length to the AEF length by the same factor f.

now, what is f ?

we know this from the relation of AC to FA.

FA = 12 mm

AC = 12 + 28 = 40 mm

so, going from AC to FA we multiply AC by f so that

AC × f = FA

40 × f = 12

f = 12/40 = 3/10

all other sides, heights, ... if ABC translate to their smaller counterparts in AEF by that multiplication with f (= 3/10).

the area of a triangle is

baseline × height / 2

aABC = 500

and because of the similarity we don't need to calculate the side and height in absolute numbers. we can use the relative sizes by referring to the original dimensions and the scaling factor f.

baseline small = baseline large × f

height small = height large × f

we know that

baseline large × height large / 2 = 500

baseline large × height large = 1000

aAEF = baseline small × height small / 2 =

= baseline large × f × height large × f / 2 =

= baseline large × height large × f² / 2 =

= 1000 × f² / 2 = 500 × f² = 500 ×(3/10)² =

= 500 × 9/100 = 5 × 9 = 45 mm²

8 0
2 years ago
Maria has $50 in a savings account in week 1. She plans on depositing $8
enot [183]

Answer:

466

Step-by-step explanation:

50 + 8*52 = 466

4 0
3 years ago
Read 2 more answers
3 more than x is less than 6
maria [59]

Answer:

x = 0

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Other questions:
  • What are the terms is the equation 6x-3(y+2)
    9·1 answer
  • NEED HELP-20pts- MUST SHOW STEPS AND HOW YOU DID IT
    9·1 answer
  • What is the median of 90, 72, 150, 43, 84, 91, 65, 48?<br><br> 105<br> 78<br> 72<br> 84
    14·2 answers
  • Please say this answer fast now​
    15·1 answer
  • 5(x - 1) and 5x - 1<br>is it equivalent ​
    11·2 answers
  • The amount of water consumed each day by a healthy adult follows a normal distribution with a mean of 1.30 liters. A health camp
    11·1 answer
  • Find two consecutive whole numbers that<br> 80 lies between.
    14·1 answer
  • If a shirt is on sale for 23% off and the sale price is $26.95, what is the original price of the shirt?
    5·1 answer
  • Which of the following represents the factorization of the polynomial below?
    8·1 answer
  • A banner is made of 8 equel parts five of the parts are green three of the parts are yellow
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!