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
svp [43]
2 years ago
12

With sales tax, it costs $64.26 to buy a $63 bookcase. What is the sales tax percentage?

Mathematics
1 answer:
dusya [7]2 years ago
8 0

Answer:

about 2 percent

Step-by-step explanation:

You might be interested in
HELP PLEASE this is due tomorrow for me!!
Debora [2.8K]

Answer:

YOUR ANSWER IS 9

Step-by-step explanation:

1.80/4= 0.45

2.70/6=0.45

5.40/12=0.45

0.45*20= 9$

5 0
3 years ago
Shelia's measured glucose level one hour after a sugary drink varies according to the normal distribution with μ = 117 mg/dl and
TiliK225 [7]

Answer:

The level L such that there is probability only 0.01 that the mean glucose level of 6 test results falls above L is L = 127.1 mg/dl.

Step-by-step explanation:

To solve this problem, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central limit Theorem

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a large sample size can be approximated to a normal distribution with mean \mu and standard deviation \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\mu = 117, \sigma = 10.6, n = 6, s = \frac{10.6}{\sqrt{6}} = 4.33

What is the level L such that there is probability only 0.01 that the mean glucose level of 6 test results falls above L ?

This is the value of X when Z has a pvalue of 1-0.01 = 0.99. So X when Z = 2.33.

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

2.33 = \frac{X - 117}{4.33}

X - 117 = 2.33*4.33

X = 127.1

The level L such that there is probability only 0.01 that the mean glucose level of 6 test results falls above L is L = 127.1 mg/dl.

6 0
3 years ago
On Monday, the book store sold 75 books. On Tuesday, the bookstore sold 125 books. The bookstore must sell 500 books by Friday.
Anettt [7]
All you have to do is add 125 by 75 and you get 200. Now you have to subtract 500 by 200 which is 300 and here you go your answer is 300. The bookstore has to sell 300 more books in order to sell 500 books by friday
5 0
3 years ago
Which expression is equivalent to n2 + 26n + 88 for all values of n?
Lelechka [254]

Answer:

Option B is correct.

The expression which is equivalent to  n^2+26n+88  is; (n+22)(n+4)

Explanation:

Given the equation: n^2+26n+88 for all values of n.

The quadratic equation in this form; ax^2+bx+c =0

First find two numbers that multiply to give ac and add to give b.

From the given equation;

a =1 , b = 26 and c =88

then,

the two number that multiply to give ac =88 is, 22 or 4

and they add up to give b=26 (i.e 22+4)

Now, rewrite the middle term i.e 26n with 22n and 4n , we have

n^2+22n+4n+88=0

Now, factor the first two terms and last two terms,

n(n+22)+4(n+22)

we see that (n+22) is common to both terms so, we have;

(n+22)(n+4)

Therefore, the expression (n+22)(n+4) is equivalent to  n^2+26n+88

Check:

(n+4)(n+22) = n\cdot n+ 22n+4n+88=n^2+26n+88   [ True]



5 0
3 years ago
Read 2 more answers
If (-2, y) lies on the graph of y = 4x, then y =<br><br> -16<br> 1/16<br> 16
emmasim [6.3K]
Y = 4x
(-2,y).....x = -2

y = 4(-2)
y = -8
7 0
3 years ago
Read 2 more answers
Other questions:
  • In the figure, the slope of mid-segment DE is -0.4. The slope of segment AC is . i need help fast plz
    10·2 answers
  • he formula for the area of a triangle is a =1/2bh, in which b represents the length of the base and h represents the height. if
    14·1 answer
  • What is wzy to the nearest degree
    15·1 answer
  • Help Math All the Points i have
    8·1 answer
  • Boris's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Boris
    7·1 answer
  • Wayne is mixing paint. He makes six quarts of brown paint by mixing equal quantities of yellow paint and violet paint. The viole
    7·1 answer
  • The diagram shows the dimensions of Mr. Green's garden. A bag of fertilizer costs $3 and covers an area of about 50 square feet.
    7·2 answers
  • What word phrase can you use to represent the algebraic expression 7x?
    13·1 answer
  • What is the sum of 3 times x and 5
    14·1 answer
  • What does a negative x negative x negative x negative equal?<br> A. Negative<br> B. Positive
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!