Answer: C. 541.60 hours
Step-by-step explanation:
Since the lifetime of a 2-volt non-rechargeable battery in constant use has a normal distribution, we would apply the formula for normal distribution which is expressed as
z = (x - µ)/σ
Where
x = lifetime of the batteries.
µ = mean lifetime
σ = standard deviation
From the information given,
µ = 516 hours
σ = 20 hours
Looking at the normal distribution table, the z score corresponding to ninety percent approximately is 1.28
Therefore,
1.28 = (x - 516)/20
Cross multiplying by 20, it becomes
20 × 1.28 = x - 516
25.6 = x - 516
x = 516 + 25.6
x = 541.6
Therefore, Ninety percent of all batteries have a lifetime less than
541.60 hours
Volume of a sphere=(4/3)πr³ ⇒r=∛(3v/4π)
volume of a sphere=950 in³
Therefore:
r=∛(3*950 in³/4π)=6.09834... in≈6.1 in
answer: radius=6.1 in
Answer:
y = 1/3X - 6
Step-by-step explanation:
Answer:314
Step-by-step explanation:
314 votes
471 x (2/3) = 314
Note that the Area of a rectangle is given by
Area = LB
Where L is the Length (the longer side) and B is the Breadth (or Width which is the shorter side).
From the image, L is (x+6).
Also from the image, B is (x+2)
This implies:

Open up the bracket by multiplying both terms:

Since the question says to leave it in polynomial form, that is your answer. Hope I helped? ☺️