Answer:
81 degrees
Step-by-step explanation:
The circumference is given by
C = 2*pi*r
20 = 2*pi*r
Divide each side by 2pi
20/2pi = 2*pi*r/2pi
10/pi =r
We know the arc length can be found by
s =r theta where theta is in radians
9/2 = 10/pi *theta
Multiply each side by pi/10 to isolate theta
9/2 * pi/10 = pi/10 *10/pi *theta
9*pi/20 = theta
We need to convert to degrees
9*pi/20 * 180/pi
81 degrees
Answer:
(0,5),A
Step-by-step explanation:
y=x-4
x=y-4
y=x+4 this is the inverse.
Answer:
No. we cannot believe it as per hypothesis test done.
Step-by-step explanation:
Given that five hundred draws are made at random with replacement from a box of numbered tickets; 276 are positive.
To test the claim whether the proportion for positive numbers is 50% let us conduct a hypothesis test for proportions.
(Two tailed test at 5% significance level)
Sample proportion p =
Std error of p =
(assuming null hypothesis to be true)
Here P = 0.50
Test statistic = p difference/std error =
Z test is used for this proportion.
p value = 0.0198
Since p value <0.05 we reject null hypothesis
At 95% confidence level, there is statistical evidence to show that sample mean is not 50%
Answer:
4%
Step-by-step explanation:
As, some rate of $320 will give u 12.80
Now to find the percentage u always use this procedure :
Sales tax value = 12.80 divided by the the total cost ( $320) multipled by hundred
So 12.80/320 x 100 = 4
So 4%
This method help me alot in my solving skills
And used it everytime a question like this is given
So I hope u use it for such questions and u will get right with all hope!
Hope this helps!!