♥ Which sets of numbers are closed under addition?
♥ Choose all answers that are correct.
A.
whole numbers
B.
natural numbers
C.
negative integers
D.
<span>integers
♥are all closed under addition.
♥Therefore ALL are right. </span>
Answer:
im pretty sure it is 2m + 10
bc the min is going up by 2 every time and the gallons are going up by 10 each time
Step-by-step explanation
i commented b4 i actually answered it bc it wouldnt let me sry
Answer:
Step-by-step explanation:
Hello!
The objective of this experiment is to test if the presence of toxaphene in the diet reduces the gain of weight. For these two random samples of female rats were made, one was fed with a diet that contained a low dose of toxaphene and the other, called the control group, was fed with the same type of food but without toxaphene. The weight of the rats was registered in both groups obtaining:
Sample 1 (with toxaphene)
n₁= 19 female rats
S₁= 58g
Sample 2 (control group)
n₂= 21
S₂= 30g
The hypothesis is that the presence of low-dose insecticide in the diet increases the variability in weight gain. Symbolically: σ₁² > σ₂²
The hypothesis is:
H₀: σ₁² ≤ σ₂²
H₁: σ₁² > σ₂²
α: 0.05
This hypothesis test is for the variance ratio, the statistic to use is:
F= (S₁²/S₂²)*( σ₁²/σ₂²)~F![_{n_1-1;n_2-1}](https://tex.z-dn.net/?f=_%7Bn_1-1%3Bn_2-1%7D)
This test is one-tailed (right) and the critical value is:
![F_{n_1-1; n_2-1; 1-\alpha } = F_{18;20;0.95} = 2.19](https://tex.z-dn.net/?f=F_%7Bn_1-1%3B%20n_2-1%3B%201-%5Calpha%20%7D%20%3D%20F_%7B18%3B20%3B0.95%7D%20%3D%202.19)
If F ≥ 2.19, you reject the null hypothesis.
If F < 2.19, you support the null hypothesis.
F= (S₁²/S₂²)*( σ₁²/σ₂²) = (3364/900)*1 = 3.737
Since the calculated value is greater than the critical value, the decision is to reject the null hypothesis. The variability of the weight gain of rats fed with a low dose of insecticide is greater than the variability of the control group.
I hope it helps!
Answer:
the surface area is 48in^2 because there are 4 faces and you have to find the surface are in which you must multiply 12 by 4.
Step-by-step explanation:
Answer:
True
Step-by-step explanation:
f-1(x) otherwise known as the inverse of f(x) is the mathematical equivalent as 1/f(x).
Being inverse simply means that it "reverses" the operation that was applied to it with the original function .
For example: suppose f(x) = x+1, then if x = 1, f(1) = 1+1 =2
Now if we do f-1(x) or 1/f(x), then 1/f(1) = 1/1 +1 = 1/2
So, 2/1 is in fact the inverse of 1/2.
Hence, f-1(x) is the same as 1/f(x)