Answer:
The percentage is 50%
Step-by-step explanation:
From the question we are told that
The mean is 
The standard deviation is 
Generally on the normal distribution curve the mean divides the curve into two. with the half to the left of the mean (50% to the left )representing the percentage of the batteries that will last less than 14 hours and the area under the curve to the right (50% to the right)representing the percentage of batteries that will last longer than mean (14 hours )
Hence the percentage of the cell phone batteries that will be expected to last longer than 14 hours is 50%
The volume of the building would be the sum of the volume of the roof and the volume of the base
For the volume of the base, the formula is
V = lwh
Where
l = length of base = 50 feet
w = width of base = 15 feet
h = height of base = 15 feet
Volume of base = 50 * 15 * 15 = 11250 square feet
For the volume of the roof, the formula is
V = 1/2lwh
Where
l = length of roof = 50 feet
h = height of roof = 10 feet
w = width of roof = 15 feet
Volume of roof = 1/2 * 50 * 10 * 15 = 3750
Volume of buiding = 11250 + 3750 = 150000 cubic feet
72k² = 9 x 8 x k x k = 3² x 2² x 2 x k x k
so √72k² = √(3² x 2² x 2 x k x k) = √3² x √2² x √2 x √k² = 6k√2
:)
<span>=<span><span><span>9/22</span></span> </span></span><span>(Decimal: 0.409091)</span>
1) I think 4.064
2)21
3)0.8125
4) 223.41
5)46.4101
Hop this help
