Answer:
Step-by-step explanation:
We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean
For the null hypothesis,
µ ≥ 50000
For the alternative hypothesis,
µ < 50000
Since the population standard deviation is given, z score would be determined from the normal distribution table. The formula is
z = (x - µ)/(σ/√n)
Where
x = lifetime of the tyres
µ = mean lifetime
σ = standard deviation
n = number of samples
From the information given,
µ = 50000 miles
x = 45800 miles
σ = 8000
n = 29
z = (50000 - 45800)/(8000/√29) = - 2.83
Looking at the normal distribution table, the probability corresponding to the z score is 0.9977
Since alpha, 0.05 < than the p value, 0.9977, then we would accept the null hypothesis. Therefore, At a 5% level of significance, the data is not highly consistent with the claim.
Answer:
<A = 44
Step-by-step explanation:
A triangle is 180 degrees
(x+59) + (x+51) + 84 = 180 >> add everything on the left side
2x + 194 = 180 >> subtract both sides by 194
2x = -14 >> divide both sides by 2 to get x alone
x = -7
since you are finding A<, substitute
<A = x + 51
<A = (-7) + 51
<A = 44
Answer:
$27.79 - $8.32 = $19.47 Divided by $6.49 = 3
Step-by-step explanation:
Kelly bought 3 stuffed animals.
Answer:
The answer is
<h2>
</h2>
Step-by-step explanation:
The midpoint M of two endpoints of a given line segment can be found by using the formula
<h3>
</h3>
where
(x1 , y1) and (x2 , y2) are the points
From the question the points are
(-4, -9), (-6, -6)
The midpoint is
<h3>
</h3>
We have the final answer as
<h3>
</h3>
Hope this helps you
<span>Volume = </span><span>π <span>• r² • height
Volume = PI * 5^2 * 10
</span></span>
<span>
<span>
<span>
Volume = 785.</span>4 cm^3
</span></span>
<span>Volume = PI * 5^2 * 4
</span>
<span><span><span>Volume = 314.</span>2 cm^3
</span>Jam consumed = </span><span>785.4 cm^3 -314.2 cm^3</span>
Jam consumed =
<span>
<span>
<span>
471.2 cm^3
answer is C
</span></span></span>
