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pentagon [3]
3 years ago
14

12. A pack of cinnamon-scented pencils sells for $4.00. What is the sales tax rate if the total cost of the pencils is $4.32?

Mathematics
1 answer:
saul85 [17]3 years ago
4 0

Answer:

12) tax rate is 8%

13) convert percent to decimal format

Step-by-step explanation:

12)   4.32/4.00 = 1.08

1.08 - 1 = 0.08

0.08 * 100 = 8%


13) Convert all % to decimal format.

Do this by dividing the percent by 100

e.g. 10% = 10/100 = 0.10


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To investigate whether or not people tend to marry spouses of similar ages or whether husbands tend to be older than their wives
ira [324]

Answer:

See explanation below

Explanation:

1) Option C is correct.

The average difference in husband and wife marriage ages in Cumberland County; μd

2) Option D is correct.

Null: The average difference in marriage ages in Cumberland County is 0.

Alt: The average difference in marriage ages is greater than 0.

3) Option A is correct

Null: μd = 0

Alt: μd > 0

4) Given:

n = 24

d' = 1.875

Sd = 4.812

Find test statistic:

t = \frac{d'}{Sd/\sqrt{n}}

= \frac{1.875}{4.812/\sqrt{24}}

t = 1.909

Degree of freedom, df = n - 1 = 24 - 1 = 23

Pvalue = (t_2_3 > 1.909) = 0.0344

Pvalue = 0.0344

Significance level = 0.05

5) Since p value is less than significance level, reject null hypothesis H0

Hence, there is strong evidence that, on average, husbands are older than their wives in Cumberland County

5 0
3 years ago
A boat moves 15.0 km across a lake in 30.0 min. what was the average speed of the boat in kilometers per hours?
Katen [24]

To work out the average speed you would have to use the formula

AS = 15.0 ÷ 30.0 = 0.5 which is distance divided by time.

The you would do 0.5 x 60 = 30 (60 minutes = 1 hour)

So the average speed would be 30.0 km/h.

4 0
3 years ago
Yall i need this to be corret please explain giving brainliest
ira [324]

Answer:

Pretty sure it's B

Step-by-step explanation:

Hope this helps

8 0
3 years ago
Help please guys help
Gnoma [55]
The answer is 24 squar cm

8 0
3 years ago
If a:b=5:6and b:c=3:8 find a:b:c?
mr_godi [17]

Answer:

(a x b ) : (b x b ) : (b x c)

5x3 : 6x3 : 6 x 8

Step-by-step explanation:

15:18:48

5 0
3 years ago
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