Answer:
72 km/h
Step-by-step explanation:
 We need to convert units
so: 
20 m    -----  1 km -------- 3600 s
1 s         -----  1000 m ----1 h
and solve ot
20 x 1 x 3600 s = 72000  we multiply  numerators
1s x 1000 m x 1 h = 1000  we multiply denominators
we divide de results 72000/1000 = 72
 
        
             
        
        
        
Sital is right 
This is because there are 10mm in a cm so therefore you would times 2.5cm by 10 to get 25mm
        
                    
             
        
        
        
Answer:
No, because the 95% confidence interval contains the hypothesized value of zero. 
Step-by-step explanation:
Hello!
You have the information regarding two calcium supplements.
X₁: Calcium content of supplement 1
n₁= 12
X[bar]₁= 1000mg
S₁= 23 mg
X₂: Calcium content of supplement 2
n₂= 15
X[bar]₂= 1016mg
S₂= 24mg
It is known that X₁~N(μ₁; σ²₁), X₂~N(μ₂;δ²₂) and σ²₁=δ²₂=?
 
The claim is that both supplements have the same average calcium content:
H₀: μ₁ - μ₂ = 0
H₁: μ₁ - μ₂ ≠ 0
α: 0.05
The confidence level and significance level are to be complementary, so if 1 - α: 0.95 then α:0.05
since these are two independent samples from normal populations and the population variances are equal, you have to use a pooled variance t-test to construct the interval:
[(X[bar]₁-X[bar]₂) ±  *
 *  ]
]


[(1000-1016)±2.060*23.57* ]
]
[-34.80;2.80] mg
The 95% CI contains the value under the null hypothesis: "zero", so the decision is to not reject the null hypothesis. Then using a 5% significance level you can conclude that there is no difference between the average calcium content of supplements 1 and 2.
I hope it helps!
 
        
             
        
        
        
If I was doing it I would split the parallelogram in half, and find the area of half of the shape and that should give you your answer. I'm so sorry if I'm wrong
        
             
        
        
        
Answer:
10
Step-by-step explanation:
30/3 = 10
If all bags have the same number of apples, then each bag has 10 apples.
Answer: 10