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Kruka [31]
3 years ago
12

Which is the value of the expression? (-2)4

Mathematics
2 answers:
Virty [35]3 years ago
4 0
The answer is b.-8 , hope that helps
Anarel [89]3 years ago
3 0

Answer:

B

Step-by-step explanation:

-2×4

=-8

a negative number multiplied by a positive number gives a negative number that is why it is -8 and not 8

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What are the coefficients and constants in 4-4y+y-3
Aleks04 [339]
Constants are 4,3. The coefficient is 4.
6 0
3 years ago
A random sample of 100 people was taken. Eighty of the people in the sample favored Candidate A. We are interested in determinin
riadik2000 [5.3K]

Answer:

Option b - not significantly greater than 75%.

Step-by-step explanation:

A random sample of 100 people was taken i.e. n=100

Eighty of the people in the sample favored Candidate i.e. x=80

We have used single sample proportion test,

p=\frac{x}{n}

p=\frac{80}{100}

p=0.8

Now we define hypothesis,

Null hypothesis H_0 : candidate A is significantly greater than 75%.

Alternative hypothesis H_1 : candidate A is not significantly greater than 75%.

Level of significance \alpha=0.05

Applying test statistic Z -proportion,

Z=\frac{\widehat{p}-p_0}{\sqrt{\frac{p_0(1-p_0)}{n}}}

Where, \widehat{p}=80\%=0.80 and p=75%=0.75

Substitute the values,

Z=\frac{0.80-0.75}{\sqrt{\frac{0.75(1-0.75)}{100}}}

Z=\frac{0.80-0.75}{\sqrt{\frac{0.1875}{100}}}

Z=\frac{0.05}{0.0433}

Z=1.1547

The p-value is

P(Z>1.1547)=1-P(Z

P(Z>1.1547)=1-0.8789

P(Z>1.1547)=0.1241

Now, the p-value is greater than the 0.05.

So we fail to reject the null hypothesis and conclude that the A is not significantly greater than 75%.

Therefore, Option b is correct.

7 0
3 years ago
Riley’s Rug Warehouse purchases rugs from the manufacturer for $82.00 each. The manager marks the rugs up 150% and then includes
Volgvan

A customer will pay $225.5 for one rug.

Step-by-step explanation:

Given,

Purchase price of rug = $82.00

Mark up = 150%

Amount of mark up = 150% of purchase price

Amount of mark up = \frac{150}{100}*82

Amount of mark up = 1.5*82 = $123

Price of rug after mark up = Purchase price + Mark up

Price of rug after mark up = 82+123 = $205

Sales tax = 10%

Amount of sales tax = 10% of price after markup

Amount of sales tax = \frac{10}{100}*205=\$20.5

Selling price = Price after markup + Amount of sales tax

Selling price = 205+20.5 = $225.5

A customer will pay $225.5 for one rug.

Keywords: percentage, markup

Learn more about percentages at:

  • brainly.com/question/10717746
  • brainly.com/question/10736268

#LearnwithBrainly

5 0
3 years ago
HELPPPP<br> What is the exact area for this figure?
Lady_Fox [76]

Answer:

8 cubic meters squared.

Step-by-step explanation:

2*4=8

8/2=4

Since they're the same... You would multiply the product by two.

4*2=8

5 0
3 years ago
What is the horizontal asymptote of the function given?
Virty [35]

Answer:

y=2

Step-by-step explanation: horizon shows where the dotted line crosses the y axis

7 0
3 years ago
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