<span>135
Using a standard normal table, you can look up the number of standard deviations for the 98% value which will be 2.054. Then multiply this number by the standard deviations and add that to the mean to get the desired value. So
2.054 * 15 + 100 = 130.81
Rounding to the nearest whole number gives you 131.</span>
3x+45=90
3x=90-45
3x=45
3x/3=45/3
x=15
Answer:
0.5358
Step-by-step explanation:
Given
mean = μ = 13.2 inches
and
SD = σ = 2.2 inches
We have to find z-score for the given value 13.4 first
z-score = (x-μ)/σ
= (13.4-13.2)/2.2
=0.2/2.2
=0.0909
We have to find the area to the left of given z-score
The area to the left is 0.5358
So, the probability of choosing an item with length less than 13.4 is 0.5358 ..
Answer: 141.3/3=47.1 so then 47.1x3.14=147.89400
Step-by-step explanation:
2 1/2 * 3
5/2 * 3/1
= 15/2
15/2 - 11 3/8
15/2 - 91/8
91/8 - 60/8
= 31/8 = 7 7/8
answer=7 7/8
