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
frez [133]
3 years ago
7

Mrs. Robinson bought a novel at a bookstore on sale for 20% off its regular price of $29.99. Mr. Chang bought the same novel at

a different bookstore for 10% off its regular price of $25. Which person received the better discount . Explain
Mathematics
2 answers:
I am Lyosha [343]3 years ago
7 0

Answer:

Mr. Chang received the better discount

Step-by-step explanation:

Mrs. Robinson bought a novel at a bookstore on sale for 20% off its regular price of $29.99

The price of the novel at a bookstore = 29.99 -(20% × 29.99)

                                                              = 29.99 - (0.20 × 29.99)

                                                              = 29.99 - 5.998

                                                              = $23.99

Mr. Chang bought the same novel at a different bookstore for 10% off its regular price of $25.

The price of the novel at a different bookstore = 25 - (10% × 25)

                                                                              = 25 - (0.10 × 25)

                                                                              = 25 - 2.5

                                                                              = $22.50

Mr. Chang bought the novel at the price of $22.50 and Mrs. Robinson bought the same novel at the price of $23.99.

Therefore, Mr. Chang received the better discount.

Kay [80]3 years ago
4 0
Mr. Robinson gets $5.99 off which is $24.00
Mr. Chang gets $2.50 off which is $22.50

Work: 
29.99x.20=5.99     29.99-5.99 = 24.00
25.00x.10=2.50     25.00-2.50 = 22.50

You might be interested in
Help please; I need the right answer ​
Ad libitum [116K]

Answer:

C.

Step-by-step explanation:

\cos x+\sqrt{2}=-\cos x \\ 2\cos x = -\sqrt 2 \\ \cos x = -\dfrac{\sqrt 2}{2}\\ \\ \Rightarrow x = \pm \arccos\Big(-\dfrac{\sqrt 2}{2}\Big)+2k\pi,\quad x\in \mathbb{Z}\\ \Rightarrow x =\pm\dfrac{3\pi}{4}+2k\pi\\ \\ \\k = -1 \Rightarrow x < 0\\\\ k=0 \Rightarrow x 2\pi

3 0
3 years ago
Read 2 more answers
The height H of a skydiver t seconds after jumping. Let T be the independent variable, and assume the skydiver jumps from a heig
Rina8888 [55]

Answer:

25 seconds

Step-by-step explanation:

Skydiving.  

height (in feet) above the earth=h(t)= -16t^2 + 10,000

the time it would take to fall when h is 0  

-16t^2 + 10,000=0

-16t^2=-10000

16t^2=10000

t^2=10000/16=625

t=sqrt 625=25 seconds

6 0
3 years ago
The water under a draw bridge was 15 feet deep at midnight. As the tide went out, the
Vsevolod [243]

Answer:

80 minutes or 1 h 20 minutes

Step-by-step explanation:

15-13=2

2/0.025=80

So we can conclude that it takes 80 minutes till it reaches 13 feet.

7 0
3 years ago
A star in the sky appears to move by 12 arcseconds over the course of 6 months. Convert this number into first areminutes then d
Bumek [7]

Answer:

Given :A star in the sky appears to move by 12 arc seconds over the course of 6 months.

To Find :Convert this number into first arc minutes then degrees.

Solution:

60 arc seconds = 1 arc minute

1 arc seconds = \frac{1}{60} arc minute

12 arc seconds = \frac{1}{60} \times 12 arc minute

12 arc seconds = \frac{1}{5} arc minute

So, 12 arc seconds = \frac{1}{5} arc minute

Now convert it into degrees

60 arc minute = 1 degree

1 arc minute = \frac{1}{60} degree

\frac{1}{5} arc minute = \frac{1}{60} \times \frac{1}{5} degree

\frac{1}{5} arc minute = \frac{1}{300} degrees

12 arc seconds = \frac{1}{300} degrees

8 0
3 years ago
Excel computes a two‑sample confidence interval for the difference in proportions just as well and as easily as Minitab and othe
True [87]

Answer:

See ecplanation below

Step-by-step explanation:

False.

On the Data analysis tool from excel we can conduct the following procedures:

Anova: Single Factor

Anova: Two factor with replication

Anova: Two factor without replication

Correlation

Covariance

Descriptive statistics

Exponential smoothing

F-test Two sample for Variances

Fourier analysis

Histogram

Moving Average

Random number generation

Rank and percentile

Regression

Sampling

t test: Paired two sample for means

t tes: Two sample assuming equal variances

t test: Two sample Assuming Unequal Variances

z test: Two sample for means

And as we can see we don't have an specific procedure just to obtain confidence interval for the difference of proportions. We need to remember that if we select a z test in excel, for example the output will contain the confidence associated to the parameter, but for this case is not too easy obtain a confidence interval for the difference of proportion like on a statistical software as (Minitab, R, SAS, etc) since all of these statistical softwares are elaborated in order to conduct all the possible statistical tests and confidence intervals for parameters of interest.

5 0
3 years ago
Other questions:
  • Help please with all of them
    10·1 answer
  • The equation y = 24000 (0.93)t represents the depreciation of a new car purchased in 2003. Which of the following explanations d
    8·1 answer
  • Jane went to the grocery store with $10 in her pocket. She wants to purchase as many 12-packs of soda that she can. One 12-pack
    13·2 answers
  • If an average grade of an English class rise from 70 to 85 what is the approximate percent increase
    11·1 answer
  • Consider the function f(x) = 9x. Which statement MUST be true? A) f(4) f(1) = f(8) f(5) B) f(4)·f(1) = f(8)·f(5) C) f(4) − f(1)
    10·2 answers
  • 10 percent of 145..........
    15·2 answers
  • A hemispherical bowl of internal diameter
    9·1 answer
  • Is -101 any rational or irrational number
    10·2 answers
  • Amplitude of y = 4 sin1/3x
    7·1 answer
  • Can somebody please help me
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!