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Triss [41]
4 years ago
14

How do I do this I'm confused

Mathematics
1 answer:
vovangra [49]4 years ago
4 0
The answer is thirteen
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PLEASE HELP WILL MARK BRAINLIEST
LuckyWell [14K]

Answer:

a) $0.500 ; (b) $5

Step-by-step explanation:

(a) 11 pound of flour =$5

1 pound of flour = $5/11

1 pound of flour = $0.500

(b) 8hours =$40

1 hour =$40/8

1 hour = $5

8 0
3 years ago
The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0 (Think of these as
bija089 [108]

Answer:

0.477 is  the probability that the average score of the 36 golfers was between 70 and 71.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 70

Standard Deviation, σ = 3

Sample size, n = 36

Let the average score of all pro golfers follow a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

P(score of the 36 golfers was between 70 and 71)

\text{Standard error of sampling} = \displaystyle\frac{\sigma}{\sqrt{n}} = \frac{3}{\sqrt{36}} = \frac{1}{2}

P(70 \leq x \leq 71) = P(\displaystyle\frac{70 - 70}{\frac{3}{\sqrt{36}}} \leq z \leq \displaystyle\frac{71-70}{\frac{3}{\sqrt{36}}}) = P(0 \leq z \leq 2)\\\\= P(z \leq 2) - P(z \leq 0)\\= 0.977 - 0.500 = 0.477= 47.7\%

P(70 \leq x \leq 71) = 47.7\%

0.477 is  the probability that the average score of the 36 golfers was between 70 and 71.

8 0
4 years ago
Use trigonometry to find the missing side. Round your answer to the nearest tenth (one decimal place)
Alchen [17]

Given:

A figure of a right triangle.

To find:

The missing side by using the trigonometric ratios.

Solution:

In a right angle triangle,

\cos \theta=\dfrac{Adjacent}{Hypotenuse}

In triangle ABC,

\cos A=\dfrac{AC}{AB}

\cos (31^\circ)=\dfrac{b}{270}

0.857=\dfrac{b}{270}

Multiply both sides by 270.

0.857\times 270=b

231.39=b

b\approx 231.4

Therefore, the missing side length is b=231.4 inches.

5 0
3 years ago
The expression 3[x-9) is equivalent to<br> 03(x)+9.<br> 03(x)+3(9)<br> O 3(%) - 9.<br> 03(x) – 3(9)
Vera_Pavlovna [14]

Answer:

srry just delete my thing

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Solve for b<br><br><br>117<br>63<br>27<br>160​
Alisiya [41]

Answer:

27

Step-by-step explanation:

180-153=b

b=27

3 0
3 years ago
Read 2 more answers
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