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erastova [34]
3 years ago
9

Let ∠D be an acute angle such that cosD=0.33. Use a calculator to approximate the measure of ∠D to the nearest tenth of a degree

.
Mathematics
2 answers:
tia_tia [17]3 years ago
6 0

Answer:

.3

Step-by-step explanation:

.33 rounded equals .3

andreyandreev [35.5K]3 years ago
5 0

Answer:

PoInT tHrEe Is ThE aNsWeR

Step-by-step explanation:

.3

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Suppose that we are testing a coin to see if it is fair, so our hypotheses are: H0: p = 0.5 vs Ha: p ≠ 0.5. In each of (a) and (
aleksley [76]

Answer:

H_0: p = 0.5\\H_a: p \neq 0.5

a. We get 56 heads out of 100 tosses.

We will use one sample proportion test  

x = 56

n = 100

\widehat{p}=\frac{x}{n}

\widehat{p}=\frac{56}{100}

\widehat{p}=0.56

Formula of test statistic =\frac{\widehat{p}-p}{\sqrt{\frac{p(1-p)}{n}}}

                                       =\frac{0.56-0.5}{\sqrt{\frac{0.5(1-0.5)}{100}}}

                                       =1.2

refer the z table for p value

p value = 0.8849

a.  We get 560 heads out of 1000 tosses.

We will use one sample proportion test  

x = 560

n = 1000

\widehat{p}=\frac{x}{n}

\widehat{p}=\frac{560}{1000}

\widehat{p}=0.56

Formula of test statistic =\frac{\widehat{p}-p}{\sqrt{\frac{p(1-p)}{n}}}

                                       =\frac{0.56-0.5}{\sqrt{\frac{0.5(1-0.5)}{1000}}}

                                       =3.794

refer the z table for p value

p value = .000148

p value of part B is less than Part A because part B have 10 times the number the tosses.

6 0
2 years ago
Work out the height of a triangle with base b= 7.7mm and area a=164.78mm2
solong [7]

Answer:

21.4 mm

Step-by-step explanation:

area ÷ base = height

164.78 mm^2 ÷ 7.7 mm

21.4 mm

Check:

base • height = area

7.7 mm • 21.4 mm = 164.78 mm^2

5 0
2 years ago
What is the slope, and what is the y-intercept of the line?
Oliga [24]
General\ equation\ for\ line\ in\ slope\ intercept\ form:
\\\\y=ax+b\\
 a-slope\\ 
b-intercept\\\\ 
y=\frac{5}{4}x+9\\\\
slope=\frac{5}{4}\\\\intercept=9
4 0
2 years ago
Valerie’s meal costs $32.75 and Derek’s meal costs $39.88. Valerie treats Derek by paying for both meals, and leaves a 14%tip. F
boyakko [2]
$32.75+$39.88=$72.63. $72.63+14%=$82.80
5 0
3 years ago
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I need helppp now I’m timed!!<br> What is the value of x?
svetlana [45]

Answer:

x = 54

Step-by-step explanation:

2x+2 = 3x-52

2x+54 = 3x

54 = x

6 0
2 years ago
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