Mathematics High School

The mean length of time, per week, that students at a certain school spend on their homework is 24.3 hours, with a standard deviation of 1.2 hours. Assuming the distribution of study
imes is normal, what percent of students spend more than 25 hours per week on homework?
Round
your answer to the nearest hundredth.

Answers

Answer 1

Answer:

21.1%

Step-by-step explanation:

(25 - 24.3) / 1.2 = 0.5833 z score = 78.9%

You need the percent that spend more than 25 hrs per week, so 100 - 78.9 = 21.1%

Related Questions

Which one is the correct answer? Can you please explain your reasoning

Answers

Answer:

2√10

Step-by-step explanation:

dont need any reasoning its right.

2x-5y=9 y-3x=-7 solve by substitution

Answers

x

=

2

and

y

=

−

1

Explanation:

y

=

3

x

−

7

   and    

2

x

−

5

y

=

9

Substitute for

y

2

x

−

5

(

3

x

−

7

)

=

9

Simplify

2

x

−

15

x

+

35

=

9

Keep going and get

−

13

x

=

−

26

So

x

=

2

Now find

y

y

=

3

x

−

7

 

→

3

(

2

)

−

7

y

=

−

1

If the original quantity is 10 and the new quantity is 3​, what is the percent​ increase?

Answers

Answer:

30% Increase

Step-by-step explanation:

We Know 3 is 30% of 10 and 10+3=13 so we know that 13 is a 30% increase of 10.

Hopes This Helps :)

HELP PLS !!! IM IN A TESTT!

Answers

1. c
2. d
3. a
4. b

Hope I got this to you in time!

cos(x+2)=sin(3x). Need done for a test please help.

Answers

Can you specify the question please I can answer it but I need more specification 87

P l e a s e NO LINKS!
Which word has reflectional symmetry across a horizontal line?
A. BOOK
B. LOOK
C. NOOK
D. ROOK

Answers

Answer:

A BOOK

Step-by-step explanation:

pretty sure its that

The word BOOK shows a reflection symmetry across a horizontal line.

Hence, option (A) is correct.

What is reflection?

Reflection is basically a mirror image of the shape, in which the image of a given figure changes accordingly to a given line or axis.

Solve with the help of options,

(A)

BOOK

To find the reflection across a horizontal line,

When word B reflected over horizontal line, it is symmetrical

Word O is symmetrical.

And K is also symmetrical across a horizontal line.

Therefore, BOOK is a reflection symmetry across a horizontal line.

To learn more about Reflection on:

https://brainly.com/question/15487308

#SPJ2

A student answer 86 problems on a test correctly and received a grade of 98% how many problems were on the test if all the problems worth the same number of points

Answers

Answer:

87 or 88

Step-by-step explanation:

86 is 98% of 87.755102

So, the number of problems must have been 87 or 88

Simplify the expression.

-6 + 2(9a + 5)

Answers

-6 + 2(9a + 5)

-6 + 18a + 10

18a + 4

Hope this helps!
Brainliest is much appreciated!
18a +4
Distribute the 2 to the 9a and the 5 to get
-6+18a+10
Combine like terms (-6 and 10) to get
18a+4

Sketch the graph of each linear inequality

Answers

Answer:

hope you can see these, the red graph is problem 3 and the blue graph is problem 5 :)

An airplane is 280 feet long. Charlie makes a scale model of the airplane at 1:140 of its actual size. How long is the model?

Answers

Answer:

2 feet long

Step-by-step explanation:

if mp is p , price including VAT is q, discount amount is r and VAT amount is s ,then find the relation between them
​

Answers

hope you can understand

Jamie joined the marching band. To pay for a uniform, he borrowed $120 for 3 months with 6% interest per month. What was the total cost of Jamie’s uniform?

Answers

Answer:

$142.92

Step-by-step explanation:

120 * 1.06^3 = 142.92192

Hedi Earns 3% commission on the jewelry she sells each week last week she sold $730 worth of jewelry how much commission did she make

Answers

730*0.03=21.9

She makes $21.90

(789+890)=(2992) answer it and i give u a taco

Answers

Answer:

False

Step-by-step explanation:

789+890 = 1679

Answer:

789+890+1313=2992

Step-by-step explanation:

What is the arc length if the central angle is 225 degrees and the radius of a circle is 3 cm

Answers

Answer:2*225*pie/360*3

Step-by-step explanation:

The required length of the arc is 11.78cm

Angle θ = 225 degrees
radius = 3 cm
arc = ?

What is an arc?

Arc is the measure of angle on the circumference of circle.

Length of an Arc = θ × (π/180) × r

Length of an Arc =225 × (π/180) ×3
= 11.78

Thus, the required length of the arc is 11.78 cm


Learn more about arc here:

https://brainly.com/question/18741430

#SPJ2

The digits from the serial number of a dollar bill are listed below.

6,8,5,8,2,8,5,8

Answers

Answer:

8 occurs most often so the number is 8.

Answer:

The mode is 8.

Step-by-step explanation:

mode means the number that occurs the most in a list.

The cost of an anti-virus software package is $65 for the first year and $10 for each annual renewal. If the independent variable is the number of annual renewals and the dependent variable is the total amount paid, what is the slope and y-intercept of the graph of the equation representing this situation?

Answers

Answer:

slope $10/renewaly-intercept $65

Step-by-step explanation:

The slope is the cost of a renewal: $10.

The y-intercept is the initial cost: $65.

Another help!!! Good points fake response =report

Answers

Answer:

135

Step-by-step explanation:

3³ × (12-2) ÷ 2 =

27 × 10 ÷ 2 =

270 ÷ 2 =

135

which expression is equivalent 2(t-4)+1?

Answers

Answer:

(Answer below)

Step-by-step explanation:

2t - 8 + 1

this is the expanded form of 2(t-4)+1 therefore, it is the same as 2(t-4)+1

how I got this: 2 x t = 2t           2 x 4 = 8           2t + 8 +1

Find the 44th term in the following
arithmetic sequence :
2, 3, 4, 5, ...
Hint: Write a formula to help you.
1st term + common difference(desired term - 1)

Answers

Answer:

45

Step-by-step explanation:

The sequence adds 1 every step. it has already taken the first 4 steps, so 40 more would just be adding 40 to 5.

Please mark brainliest I really need it

Answer:

43 I think that is the Answer

Given g(x)=-x+4g, solve for x when g(x)=8

Answers

Answer:g(-4)=8

Step-by-step explanation:

Answer:

Step-by-step explanation:

Can you help me with number 45 please ?

Answers

Answer:

h = 84

f = 132

g= 28

Step-by-step explanation:

h = 180 - 48 - 48 = 84

f = 180 - 48 = 132

g = 180 -132 - 20 = 28

Can someone answer this no bots please I will give you brainliest… please

Answers

Answer: Alice

Step-by-step explanation: Alice won because she started furthest From the starting line.

sub duplicate ratio of 16:9 is​

Answers

The sub duplicate ratio of 16:9 is

4: 3

Sub duplicate ratios

The sub-duplicate ratio is found by finding the square root of both the numerator and denominator

The given ratio is 16:9

Find the square root of 16

[tex] \sqrt{16} = 4[/tex]

Find the square root of 9

[tex] \sqrt{9} = 3[/tex]

Combining the two square roots that were found, the sub duplicate is:

[tex] \frac{4}{3} [/tex]

Therefore, the sub duplicate ratio of 16:9 is

4: 3

Learn more on sub duplicate of ratios here: https://brainly.com/question/25881746

if p(x)=x^2-4x+3 evaluvate p(2)-p(-1)+p(1/2)

Answers

Answer:

....◉‿◉◉‿◉◉‿◉◉‿◉◉‿◉◉‿◉

What is the Square root of -18

Answers

Answer:

3i square root 2

Step-by-step explanation:

Explain how to use the distributive property to find an expression that is equivalent to 20+16.

Answers

Answer:

Explain how to use the distributive property to find an expression that is equivalent to 20 + 16. First, I would find that the GCF of 20 and 16 is 4. Then, I would divide both 20 and 16 by 4. Last, I would use the distributive property to write the sum as 4(5 + 4).

which graph best represents the solution set of y< -4x?​

Answers

D because the line is not "dotted' and it's on the y intercept and not in the x-axis

What is the exact length of AB ?

Answers

Answer:

B

4*2=8

Hope This Helps!!!

2. Which of these situations can be represented by the
opposite of -25?
A. scuba diver is 25 feet below sea level.
B. Leon gets paid $25.
C. An airplane descends 25 feet.
D. Sara has a $25 debt.
a

Answers

Answer:

B

Step-by-step explanation: Because he gains $25, which is positive

A 25 feet below sea level.
Other Questions
What is the function graphed below?3Oy=x-1Oy=1 X-1Oy=1x+11Oy=x+1 client quietly paces in the ed waiting area with his hands on his hips and rubbing his mid-lower left side. he has a flat facial expression. which factor is most important for the nurse to consider when interpreting this clients pain behavior? there are 47 students in the science club. all but 5 of them went on a field trip to the planetarium. what is the total cost if each student who went on the field trip paid $7? Determine the rTo understand the concept of nodes of a standing wave.The nodes of a standing wave are points where the displacement of the wave is zero at all times. Nodes are important for matching boundary conditions, for example that the point at which a string is tied to a support has zero displacement at all times (i.e., the point of attachment does not move).Consider a standing wave, where y represents the transverse displacement of a string that extends along the x direction. Here is a common mathematical form for such a wave:y(x,t)=Acos(kx)sin(t),where A is the maximum transverse displacement of the string (the amplitude of the wave), which is assumed to be nonzero, k is the wavenumber, is the angular frequency of the wave, and t is time.Part AWhich one of the following statements about wave y(x,t) is correct?adius of the 236U nucleus. stions 5-7 the Grade 6 pupils graduated? In a school of 680 Grade 6 pupils, 646 graduated. What percent of the Grade 6 pupils graduated ? Our store is having a __ sale (Statistics)Which of the following is NOT a characteristic of a least squares regression line? What values did the British middle class have during industrialization? Share 30 in the ratio 1:5 between Tim and Sam choose The benefits of the new technology far ........ any drawbacks it has. A exceed C outweigh B escalate D overwhelm does anyone do noredink for ELA School yearbooks were printed and the table shows the number of people who bought them the first, second, third, and fourth weeks after their release .which graph could represent the data shown in the table? Table and options below!PLS HURRY!30 POINTS ANS BRAINLEST! What eventually led to the abandonment of jamestown?1/ malaria-carrying mosquitoes2/ riots started by slaves3/ famine4/ a civil war PLZZZZZ HELPPP MEEEEE Part BWrite a short paragraph describing the scene and the kind of weather that you see in each picture. Use the vocabulary you've learned in thelesson Mr. Williams drew the following image on the board and asked his students to write a sequence of steps explaining how to construct a line which passes through point C and is perpendicular to line AB. The work of two students, Elias and Greyson, is shown. Add the phrase that completes the thought in the underlined sentence . General meaning of make which term means a sudden and widespread outbreak of a disease within a population group or area? HURRY QUICK!! Evaluate the following expression when x = -4 and y = 4.