Answer:
D. 21.
Step-by-step explanation:
The general form of the equation of a circle is:
(x - a)^2 + (y - b)^2 = r^2 where r is the radius.
Comparing:
(x + 5)^2 + (y + 7)^2 = 21^2
So r^2 = 21^2
making r = √21^2
= 21.
Step-by-step explanation:
There are 20 chips in total.
P(red) = 8/20 = 2/5
P(not green) = 16/20 = 4/5
P(yellow or green) = 9/20
Answer:
The distributive property! 6+30= 6(1+5)
;)
Step-by-step explanation:
Answer:
Hence the critical value for the right-tailed test is . Since the test value is greater than the critical value so we reject the null hypothesis.
Step-by-step explanation:
Hypotheses are:
Here we have s_{1}=6800 and s_{2}=3900. Here we will use F -test. The Value of test statistics is
Here the degree of freedom of the numerator is and The degree of the denominator is
The critical value for the right-tailed test is . Since the test value is greater than the critical value so we reject the null hypothesis.