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
Anna35 [415]
3 years ago
13

Evaluate log4 64. A) 8 B) 3 C)1/2 D)2

Mathematics
1 answer:
barxatty [35]3 years ago
5 0
Its B. Huhu you can press the calculator and get the answer:>

You might be interested in
Use the slope-intercept form to graph y=3/5x-3
sleet_krkn [62]

Answer:

Step-by-step explanation:

7 0
3 years ago
Find the area of the triangle with vertices A(-3,2), B(1,-2), and c(1,3)
amm1812

Answer:

10cm2

Step-by-step explanation:

A=1÷2×4×5=10cm2

4 0
2 years ago
max lost 23 pounds while on a diet. he now weighs 184 pounds. write and solve an equation to find his initial weigh w
valina [46]

184+23=w

His initial weight is 207 pounds

6 0
3 years ago
Someone please help me out with this, thank you!
zaharov [31]

Answer:

(2,-2)

Step-by-step explanation:

the x-intercept is 2

and y-intercept is-2

x-intercept is when you have a number comma 0 e.g 3,0. 2,0

y-intercept is when u have 0 comma a number e.g 0,2 0,-5



3 0
3 years ago
The authors of a paper describe an experiment to evaluate the effect of using a cell phone on reaction time. Subjects were asked
Serggg [28]

Answer:

a) The 99% confidence interval would be given by (24.409;24.979)  

b) n=464

Step-by-step explanation:

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

Part a

The confidence interval for the mean is given by the following formula:  

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}} (1)  

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:  

df=n-1=47-1=46  

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,46)".And we see that t_{\alpha/2}=2.01  

Now we have everything in order to replace into formula (1):  

525-2.01\frac{75}{\sqrt{47}}=503.01  

525+2.01\frac{75}{\sqrt{47}}=546.99  

So on this case the 95% confidence interval would be given by (503.01;546.99)

Part b

The margin of error is given by this formula:  

ME=t_{\alpha/2}\frac{s}{\sqrt{n}} (1)  

And on this case we have that ME =7 msec, we are interested in order to find the value of n, if we solve n from equation (1) we got:  

n=(\frac{t_{\alpha/2} s}{ME})^2 (2)  

The critical value for 95% of confidence interval is provided, t_{\alpha/2}=2.01 from part a, replacing into formula (2) we got:  

n=(\frac{2.01(75)}{7})^2 =463.79 \approx 464  

So the answer for this case would be n=464 rounded up to the nearest integer  

8 0
3 years ago
Other questions:
  • Please answer this correctly without making mistakes
    12·2 answers
  • Factor x2+4x-12 , Your help is sincerely appreciated and is not taken lightly. Once again. I thank you.
    15·1 answer
  • The segments shown below could form a triangle.<br><br>A. True <br>B. False​
    10·1 answer
  • Find the value of the following expression:<br> 5 3/5 ÷ 1 1/2 = ????
    12·1 answer
  • A pyramid has a square base of length 4.8 m and a total surface area of 85 m². Find the volume of the pyramid.​
    11·1 answer
  • The rule for the number pattern is to add 56<br> 411,___,___,___
    7·1 answer
  • What expression is equivalent to -3(4x - 2) - 2x
    5·1 answer
  • 50 POINT I NEED HELP BAD
    15·2 answers
  • Write the equation of a line that passes through the point (-2,7) and perpendicular to a line that passes through the points (-6
    6·1 answer
  • 42. Estimate: 48293-39​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!