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lesantik [10]
3 years ago
7

Please help me with this if you know the answers! i am behind on my work and i need the help! only Use the answere optoin if you

actually know the answer, not just to get free points! thank you.
==Q1==
You treated yourself and a friend to sodas and snacks at a concert. The total was $16.75. You tipped 15%, and there was a sales tax of 6.5%. What was the total amount you paid?
A. $19.10
B. $20.35
C. $21.52
D. $22.02
==Q2==
All batteries were listed on sale for 15% off the regular price. Keith usually pays $6.99 for a battery for his watch. What discount will Keith receive on his purchase of a new watch battery?
A. $0.15
B. $0.80
C. $1.05
D. $1.30
==Q3==
Jessica purchased an $84 suit. The sales tax is 6.5%. What is the total price of the suit including tax?
A. $88.62
B. $89.46
C. $130.20
D. $128.60
==Q4==
The sales tax rate is 7.25%. How much sales tax will Kevin pay on a $52.50 messenger bag?
A. $0.38
B. $3.81
C. $3.94
D. $39.40
==Q5==
Evelyn gave a $3 tip to the person delivering her $15 pizza. What percent of the cost of the pizza was the tip that she paid?
A. 3%
B. 5%
C. 15%
D. 20%
==Q6==
Bobbi wanted to purchase a shirt that had an original price of $38.99 at the store where she works. She gets an employee discount of 25%. How much will she need to pay for the shirt?
A. $28.00
B. $28.50
C. $29.24
D. $38.00
==Q7==
For a party, Sue bought plastic plates for $3.65, cups for $4.25, three boxes of plastic tableware for $0.99 each, and a plastic tablecloth for $6.75. Sales tax is 5.5%. What is the total cost for Sue’s purchases, including tax?
A. $15.64
B. $16.50
C. $17.62
D. $18.59
==Q8==
the bill at the restaurant totaled $45.60. Shawn wants to leave a 15% tip. How much would Shawn leave for a tip?
A. $4.56
B. $6.02
C. $6.84
D. $9.12
==Q9==
The best-selling book Samantha has been waiting for hit the shelves at $21.56. What percent discount was this off the cover price of $26.95?
A. 20%
B. 25%
C. 30%
D. 35%
==Q10==
Scott received $88.50 from a customer whose meal bill was $75. What percent tip did Scott receive?
A. 12%
B. 15%
C. 18%
D. 20%
===========================
Mathematics
2 answers:
gavmur [86]3 years ago
5 0

Answer:

#8= C.( $6.84

Step-by-step explanation:

#8= C. ($6.84)

*explanationfor8*

15x45.60= 684 divided by 100= $6.84

(thats all I could answer, sorry!)

photoshop1234 [79]3 years ago
3 0

Answer:

Step-by-step explanation:

Q1

(16.75*1.065)*(1.15)=21.52. Tax comes before tip so has to be done in that order. Hope it helps.

Q2

C. is the correct answer. To work it out for yourself just work out what 10 percent is and then half that. IE. 5 percent and add the two figures together.

Q3

16.75*1.15*1.065

=20.5145625

=20.51

therefore, the closest answer is B

Q4

The sales tax rate is 7.25%.

Cost of messenger bag = $52.50

Kevin will pay sales tax = 7.25% of 52.50

                                     = \frac{7.25}{100}\times 52.50

                                     = 0.0725 × 52.50

                                     = $3.80625 ≈ $3.81

Kevin will pay $3.81 sales tax on messenger bag

Q5

D. 20%

$15 x .2= $3

if you didn't have the options you could do

3/15=.2

Q6

x = (38.99) (.25) x = 9.75 Then; x = $38.99 - $9.75 x = $29.24 Bobbi needs to pay $29.24 for the shirt.

Q7

3.65 + 4.25 + (0.99 x 3) + 6.75 = 17.62

5.5% = 0.055

17.62 x 0.055 = 0.97

17.62 + 0.97 = 18.59

Q8

Shawn would leave $6.84 for a tip. Solution: 15% = 0.15 0.15 * $45.60 = $6.84

Q9

26.95 * x = 21.56

x = 21.56/26.95

x = 0.8

x = 80%

=> 100% - 80% = 20%

Q10

75................100%

(88.5-75)........x

x=(13.5*100):75

x=1350/75

x=18

Answer: 18%

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A)H0: μ1 − μ2 = 0

Ha: μ1 − μ2 ≠ 0

(b)  Means

Company A___50.6___ min.

Company B___52.75___ min.

c)The t-value is -0.30107.

The p-value is 0 .764815.

C) Do not reject H0. There is no statistical evidence that one airline does better than the other in terms of their population mean delay time.

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A)H0: μ1 − μ2 = 0

i.e there is no difference between the means of delayed flight for two different airlines

Ha: μ1 − μ2 ≠ 0

i.e there is a difference between the means of delayed flight for two different airlines

(b)

Company A___50.6___ min.

Company B___52.75___ min.

Mean of Company A = x`1= ∑x/n =34+ 59+ 43+ 30+ 3+ 32+ 42+ 85+ 30+ 48+ 110+ 50+ 10+ 26+ 70+ 52+ 83+ 78+ 27+ 70+ 27+ 90+ 38+ 52+ 76/25

= 1265/25= 50.6

Mean of Company B = x`2= ∑x/n =

=46+ 63+ 43+ 33+ 65+ 104+ 45+ 27+ 39+ 84+ 75+ 44+ 34+ 51+ 63+ 42+ 34+ 34+ 65+ 64/20

= 1055/20= 52.75

<u><em>Difference Scores Calculations</em></u>

Company A

Sample size for Company A= n1= 25

Degrees of freedom for company A= df1 = n1 - 1 = 25 - 1 = 24

Mean for Company A= x`1=  50.6

Total Squared Difference (x-x`1) for Company A= SS1: 16938

s21 = SS1/(n1 - 1) = 16938/(25-1) = 705.75

Company B

Sample size for Company B= n1= 20

Degrees of freedom for company B= df2 = n2 - 1 = 20 - 1 = 19

Mean for Company B= x`2=  52.75

Total Squared Difference (x-x`2) for Company B= SS2=7427.75

s22 = SS2/(n2 - 1) = 7427.75/(20-1) = 390.93

<u><em>T-value Calculation</em></u>

<u><em>Pooled Variance= Sp²</em></u>

Sp² = ((df1/(df1 + df2)) * s21) + ((df2/(df2 + df2)) * s22)

Sp²= ((24/43) * 705.75) + ((19/43) * 390.93) = 566.65

s2x`1 = s2p/n1 = 566.65/25 = 22.67

s2x`2 = s2p/n2 = 566.65/20 = 28.33

t = (x`1 - x`2)/√(s2x`1 + s2x`2) = -2.15/√51 = -0.3

The t-value is -0.30107.

The total degrees of freedom is = n1+n2- 2= 25+20-2=43

The critical region for two tailed test at significance level ∝ =0.05 is

t(0.025) (43) = t > ±2.017

Since the calculated value of t=  -0.30107.  does not fall in the critical region t > ±2.017, null hypothesis is not rejected that is there is no difference between the means of delayed flight for two different airlines.

The p-value is 0 .764815. The result is not significant at p < 0.05.

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