1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Allushta [10]
2 years ago
11

Please help!!

Mathematics
1 answer:
Elan Coil [88]2 years ago
5 0
Your answer would be the time in takes for carbon-14 to elapse 3 half-lives.
5730 • 3 = 17190
You might be interested in
Use the normal distribution and the given sample results to complete the test of the given hypotheses. Assume the results come f
AlladinOne [14]

Answer:

z=\frac{0.64 -0.5}{\sqrt{\frac{0.5(1-0.5)}{75}}}=2.43  

Now we can calculate the p value with the following probability:

p_v =P(z>2.43)=0.0075 \approx 0.008  

Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude that the true proportion for this case is higher than 0.5

Step-by-step explanation:

Data given and notation

n=75 represent the random sample taken

\hat p=0.64 estimated proportion of interest

p_o=0.5 is the value that we want to test

\alpha=0.05 represent the significance level

Confidence=95% or 0.95

z would represent the statistic

p_v represent the p value

System of hypothesis

We want to verify if the true proportion is higher than 0.5:  

Null hypothesis:p =0.5  

Alternative hypothesis:p > 0.5  

The statistic is given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing the info given we got:

z=\frac{0.64 -0.5}{\sqrt{\frac{0.5(1-0.5)}{75}}}=2.43  

Now we can calculate the p value with the following probability:

p_v =P(z>2.43)=0.0075 \approx 0.008  

Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude that the true proportion for this case is higher than 0.5

7 0
3 years ago
Order 27.657, 27.658, 27.558, and 27.659 in decreasing order.<br><br> Thx-Kheri Moore
Vikki [24]

Answer:

The answer is

1.    27.659

2.   27.658

3.   27.657

4.   27.558

Step-by-step explanation:

Decreasing order is greatest number to the least.

I really hope this helps

4 0
2 years ago
Read 2 more answers
Simplify.<br><br> (-5.12) - (-4.7) + (7.021)<br><br> 6.79<br> 6.601<br> -2.799
liq [111]
The answer is 6.601, and therefore, the second option.
8 0
2 years ago
Read 2 more answers
The following are score earned by 15 college students on a 20-point math quiz. (a) calculate the mean, median, and mode scores.
Softa [21]

Answer:

(a) 12.87; 14; 18; (b) median  

Step-by-step explanation:

(a) Statistics

(i) Mean

The mean is the sum of all the data points divided by the number of points.

\begin{array}{rcl}\text{Mean} & = & \dfrac{0 + 2 + 3 + 12 + 12 + 13 + 14 + 14 + 15 + 15 + 18 + 18 + 18 + 19 + 20}{15}\\\\& = & \dfrac{193}{15}\\\\& = & \mathbf{12.87}\\\end{array}

(ii) Median

The median is the middle value in your list of observations.

0, 2, 3, 12, 12, 13, 14, 14, 15, 15, 18, 18, 18, 19, 20

Median = 14

(iii) Mode

The mode is the value that appears most often in your list of observations.

0, 2, 3, 12, 12, 13, 14, 14, 15, 15, 18, 18, 18, 19, 20

Mode = 18

(b) Most representative measure

The mean is dragged down by three low values. The median is the measure that is most representative of the data.

The histogram below shows the distribution of your data.

8 0
2 years ago
Romeo will roll a 6-sided number cube, numbered 1-6, twice. What is the probability of rolling an odd number on the 1st roll and
elena-s [515]
1st rol= 3/6
2nd roll= 1/6
8 0
2 years ago
Other questions:
  • In a busy period you are required to use the support
    9·1 answer
  • Multiply. 3 1/2 ⋅ 2 2/3 ( A. 9 1/6 B. 21 1/16 C. 9/13 D. 9 2/3 )
    14·1 answer
  • -3( x + 4) + 5x &lt; -16 Can someone help mee plss
    8·1 answer
  • Trevor saves 2/3 of the money he earns at his after-school job. Suppose Trevor starts saving 1/4 as much as he s saving now. Wil
    10·1 answer
  • What is the equation of a line that is perpendicular to -x+2y=4 and passes through the point (-2,1)?
    14·1 answer
  • UESTION 2 120 MARKS Underground cable breakdown often occur due to the unpredictable deterioration rate of the cable insulation.
    6·1 answer
  • A rectangular field has a length of 0.26 miles and a width of 0.48 miles find the area of the field
    9·1 answer
  • Help me with this pls
    14·2 answers
  • Two fair dice are rolled. The score is the difference between the two dice.
    8·1 answer
  • This figure is of a circle What is the best approximation for the perimeter of the figure? Use 3.14 to approximate pi 4 4 7 cm 7
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!