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
chubhunter [2.5K]
3 years ago
11

In a recent survey of 655 working americans ages 25-34, the average weekly amount spent on lunch was $43.29 with standard deviat

ion $2.75. The weekly amounts are approximately bell-shaped
Mathematics
1 answer:
Nookie1986 [14]3 years ago
4 0

Answer:

99.7%

Step-by-step explanation:

Given that:

sample size (n) = 655

sample mean (\overline x) = 43.29

Standard deviation \sigma = 2.75

Let's assume we are to estimate the percentage between $33.72 and $51.54

Then;

The test statistics at 33.72 is :

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

Z = \dfrac{33.72 -43.29}{2.75}

Z = -3.48

Z at 51.54

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

Z = \dfrac{51.54 -43.29}{2.75}

Z = 3.00

Using the empirical standard rule, the percentage will be 99.7%

You might be interested in
50 POINTS 10 QUESTIONS! <br><br> Solve each quadratic equation using factoring<br><br> PLEASE HELP!!
Tanzania [10]

Answer:

Quadratic Equation | Factoring

Solve each quadratic equation using factoring.

1) v² + 5v + 6 = 0

doing middle term factorisation

v²+(3+2)v+6=0

v²+3v+2v+6=0

v(v+3)+2(v+3)=0

(v+3)(v+2)=0

either

<u>v=-3</u>

<u>or</u>

<u>v=-2</u>

2) g² - 3g = 4

keeping all terms in one side

g²-3g-4=0

doing middle term factorisation

g²-(4-1)g-4=0

g²-4g+g-4=0

g(g-4)+1(g-4)=0

(g-4)(g+1)=0

either

<u>g=4</u>

<u>or</u>

<u>g=-1</u>

3)w² + 4w = 0

w(w+4)=0

either

<u>w=0</u>

<u>or</u>

<u>w=-4</u>

4) s² - 8s + 12 = 0

doing middle term factorisation

s²-(6+2)+12=0

s²-6s-2s+12=0

s(s-6)-2(s-6)=0

(s-6)(s-2)=0

either

<u>s=6</u>

<u>or</u>

<u>s=2</u>

5) x ²+ 2x - 35 = 0

doing middle term factorisation

x²+(7-5)x-35=0

x²+7x-5x-35=0

x(x+7)-5(x+7)=0

(x+7)(x-5)=0

either

<u>x=-7</u>

<u>or</u>

<u>x=5</u>

6) r(r + 2) = 99

opening bracket

r²+2r=99

keeping all terms in one side

r²+2r-99=0

r²+(11-9)r-99=0

r²+11r-9r-99=0

r(r+11)-9(r+11)=0

(r+11)(r-9)=0

either

<u>r=-11</u>

<u>or</u>

<u>r=9</u>

7)k(k-4)=-3

opening bracket

k²-4k=-3

keeping all terms in one side

k²-4k+3=0

k²-(3+1)k+3=0

k²-3k-k+3=0

k(k-3)-1(k-3)=0

(k-3)(k-1)=0

either

k=3

or

k=1

8)t²+ 3t + 2 = 0

doing middle term factorisation

t²+(2+1)t+2=0

t²+2t+t+2=0

t(t+2)+1(t+2)=0

(t+2)(t+1)=0

either

<u>t</u><u>=</u><u>-</u><u>2</u>

<u>or</u>

<u>t</u><u>=</u><u>-</u><u>1</u>

9)m ^ 2 - 81 = 0

m²=81

doing square root in both side

\sqrt{m²}=\sqrt{9²}

<u>m=±9</u>

<u>either</u>

<u>m</u><u>=</u><u>9</u>

<u>or</u>

<u>m</u><u>=</u><u>-</u><u>9</u>

10) h²- 17h + 70 = 0

doing middle term factorisation

h²-(10+7)h+70=0

h²-10h-7h+70=0

h(h-10)-7(h-10)=0

(h-10)(h-7)=0

either

<u>h</u><u>=</u><u>1</u><u>0</u>

<u>or</u>

<u>h</u><u>=</u><u>7</u>

6 0
3 years ago
Read 2 more answers
Please help me out with this​
AURORKA [14]
6m (m+2) = 0 is the factored form
m=0, m=-2 is m

Steps are on paper
If you need more explanation, comment

4 0
3 years ago
Dollar Dress Shop’s inventory at cost on January 1 was $82,800. Its retail value was $87,500. During the year, Dollar purchased
lorasvet [3.4K]

The inventory of Dollar Dress Shop at cost when the retail method is used is $117, 500.

<h3>How to find the inventory cost?</h3>

When using the Retail method to find the inventory at cost, the Beginning inventory, the purchases, and the net sales are used.

The formula for finding the cost of inventory using the retail method is:

= Beginning inventory + Purchases - Net sales

= $ 87, 500 + $ 325, 000 - $ 295, 000

= $117, 500

The inventory cost of Dollar Dress Shop with the retail method is $ 117, 500.

Find out more on inventory cost at brainly.com/question/20318114

#SPJ1

6 0
1 year ago
Read 2 more answers
Someone helppppp plsss j suck at math. ( pls answer only if your sure ur right)
Degger [83]

Answer:

Step-by-step explanation:

4 0
3 years ago
Solve 7x 6 &lt; 3(x - 2).{x | x &gt; -3}{x | x &lt; -3}{x | x &lt; -2}{x | x &lt; 0}
Lelechka [254]
7x + 6 < 3(x - 2)
7x + 6 < 3x - 6
7x - 3x < -6 - 6
4x < -12
x < -12/4
x < -3

<span>{x | x < -3}</span>

6 0
3 years ago
Other questions:
  • A farmer plants corn and soybeans. This model shows the area reserved for each.
    11·2 answers
  • Which number is equal to 2.98* 10^5
    11·1 answer
  • Christian used 2/3 of a bottle of soap. To determine how much soap was left, he took the original amount of x ounces and calcula
    13·1 answer
  • 15. Greg and Alana went out to dinner. Their dinner bill came to $68.89.
    6·1 answer
  • PLEASE HELP
    10·1 answer
  • Solve for x.<br><br><br> A.90<br> B.100<br> C.135<br><br><br><br><br> HELP ME
    12·1 answer
  • Raven needs new winter boots. Both ShoeTown and LaceUp shoe stores carry the boots she wants to buy. The boots are regularly pri
    10·1 answer
  • A new phone costs $450. There is a 40% discount on the price of the phone and an 8% sales tax on the discount price. What is the
    7·2 answers
  • Select all that apply. Which groupings are located on the File tab?
    11·1 answer
  • ***<br> Write the rule for the value of the term of the geometric sequence:<br> -5, 10, 20, 40, ..
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!