Answer:
21
Step-by-step explanation:
given : 2 triffles = 7
6 / 2 = 3 so miutiple both side by 3
2 x 3 = 6 and 7 x 3 = 21
6 triffles = 21
OR
Find the cost of 1 triffle:
7 / 2 = 3.5
1 triffle = 3.50
3.50 each x 6 triffles = 21
Answer: We reject the null hypothesis.
Step-by-step explanation:
Since we have given that
n = 223
Number of subjects developed nausea = 50
![\hat{p}=\dfrac{50}{238}=0.21](https://tex.z-dn.net/?f=%5Chat%7Bp%7D%3D%5Cdfrac%7B50%7D%7B238%7D%3D0.21)
We need to claim that more than 20% of users develop nausea.
So, Hypothesis:
![H_0:p\leq 0.20\\\\H_a:p](https://tex.z-dn.net/?f=H_0%3Ap%5Cleq%200.20%5C%5C%5C%5CH_a%3Ap%3C0.20)
test statistics would be
![z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\\\\z=\dfrac{0.21-0.20}{\sqrt{\dfrac{0.2\times 0.8}{223}}}\\\\z=\dfrac{0.01}{0.0268}\\\\z=0.373](https://tex.z-dn.net/?f=z%3D%5Cdfrac%7B%5Chat%7Bp%7D-p%7D%7B%5Csqrt%7B%5Cdfrac%7Bp%281-p%29%7D%7Bn%7D%7D%7D%5C%5C%5C%5Cz%3D%5Cdfrac%7B0.21-0.20%7D%7B%5Csqrt%7B%5Cdfrac%7B0.2%5Ctimes%200.8%7D%7B223%7D%7D%7D%5C%5C%5C%5Cz%3D%5Cdfrac%7B0.01%7D%7B0.0268%7D%5C%5C%5C%5Cz%3D0.373)
At 0.10 level of significance, z = 1.28
Since 0.373<1.28 so, test statistic is less than critical value.
Hence, we reject the null hypothesis.
Answer:
9 years = 12 grams
Step-by-step explanation:
0 years = 96 grams
After 3 years , the amount left is 1/2 of what you started with
3 years = 1/2 *96 = 48 grams
After 3 years , the amount left is 1/2
6 years = 1/2 (48) = 24 grams
After 3 years , the amount left is 1/2
9 years = 1/2 ( 24) = 12 grams
Answer:
-4 times, multiply, divide, subtract or add by 1
-4 is on the x line and (x) comes first in the equation. so x + y. Or whatever way your finding the answer.