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
Xelga [282]
3 years ago
11

Nora had already read 30% of the book before her teacher assigned it to the class. She is choosing between two options to finish

reading the book.
• Option 1: read 25% of the remaining pages each night

• Option 2: read 28 pages each night
Which option should Nora use to finish the book in the least amount of time?
Fill in the blanks to complete the statements.

Nora has already read ____ pages. She has ____ pages remaining in the book. Nora should choose Option ____ because it will take her ____ nights to finish instead of ____ nights with Option ____. ​
Mathematics
1 answer:
guapka [62]3 years ago
7 0

Answer:

Let p represent the # of pages in the book.  Then, Nora has already read 0.30p pages and has 0.70p pages left to read.

If she reads 25% pages/night, that means reading 0.25(0.70)p pages per night, or 17.5 pages/night.  If 28% p/n, that means 0.28(0.70)p pages/night, or 19.6p pages/night.

How many nights will it take Nora to finish the book if she reads 25% of 7/10 of the book per night?  Without any calculations, we can answer this by "4 nights, since she reads 1/4 of the unread portion of the book per night."

If she reads 28% of 7/10 of the book per night, that will require fewer nights:

First night:  28%

Second night:  28%  

Third night:  28%

 Total:  3(28%) = 84%

This leaves 16% to read on the final night.

This is one interpretation of what I think is a poorly worded question.

The author of this question might have meant reading 25% of the remaining unread pages per night, which leads to a different answer.

You might be interested in
Write the cubic polynomial function f(x)in expanded form with zeros −6,−5,and −1, given that f(0)=60
RSB [31]

Answer:

f(x)=2x^{3}+24x^{2}+82x+60

Step-by-step explanation:

we know that

The roots of the polynomial are the values of x when the value of the polynomial f(x) is equal to zero

The roots of the polynomial function are

x=-6 -----> (x+6)=0

x=-5 -----> (x+5)=0

x=-1 -----> (x+1)=0

The equation of the cubic polynomial is

f(x)=a(x+6)(x+5)(x+1)

where

a is the leading coefficient

Remember that

f(0)=60

That means ------> For x=0 the value of f(x) is equal to 60

substitute the value of x and the value of y in the function and solve for a

60=a(0+6)(0+5)(0+1)

60=a(6)(5)(1)

60=30a

a=2

so

f(x)=2(x+6)(x+5)(x+1)

Applying the distributive property

Convert to expanded form                  

f(x)=2(x+6)(x+5)(x+1)\\\\f(x)=2(x+6)(x^{2}+x+5x+5)\\\\f(x)=2(x+6)(x^{2}+6x+5)\\\\f(x)=2(x^{3}+6x^{2}+5x+6x^{2}+36x+30)\\\\f(x)=2x^{3}+24x^{2}+82x+60

3 0
3 years ago
PLEASE HELP ME!!!! I NEED THIS QUICKLY!!
Sergio [31]

Answer:

i79

Step-by-step explanation:

7 0
3 years ago
Using number lines 80 is 25% of what number
Goshia [24]
25% can be made in to 100% by multiplying it by 4.

Therefore, we can find the answer by multiplying 80 by 4.


80 * 4 = 320
3 0
3 years ago
Which of the following numbers is irrational?
love history [14]
the square root of three when multiplied by itself if the number three it is more precisely call the principal square root of three the square root of three is an irrational number approved the irrationality
6 0
3 years ago
(08.05)The box plot shows the total amount of time, in minutes, the students in a class spend traveling to school each day: A bo
Harman [31]
<span>Box plots give the five number summary of the data set. The whiskers indicate the minimum daily travel time, which is 11 minutes, and the maximum daily travel time, which is 45 minutes. These values are not outliers because they are connected to the box with whiskers. Meanwhile, the box indicates that the first quartile of the data set is 16, the median is 28, and the third quartile is 36.</span>
6 0
3 years ago
Other questions:
  • Subtract 24 from 28 then divide by 2
    10·1 answer
  • Which number sentence is represented by the model
    9·2 answers
  • Distance between New York and San Francisco is 2,563.79 miles. A train travels at an average speed of 90 miles per hour. What eq
    6·1 answer
  • HELP PLEASE!
    7·2 answers
  • The sum of two consecutive integers is 157. Find the smallest integer.
    12·1 answer
  • How many terms does the polynomial x^2 y^2 have
    11·1 answer
  • 1. If 4.75x = 12.35, what is the value of x?
    15·1 answer
  • Suppose you and some friends go to the movies and buy some snacks. The snack bar charges $2 for a box of candy and $6 for the “c
    15·1 answer
  • Find the value of y.
    15·1 answer
  • Please help!!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!