R: -4,-3
S: -3,1
T: 1,-2
U: stays the same
((:
Answer:
0.245
Step-by-step explanation:
In order to find find the probability that the mean of the groups age is between 90 and 100 months, we have to find z for each value
Z = (x – mean)/standard deviation
Le x be the average age of a vehicle
Z1 = (90 – 96)/16 = -0.375
Z2 = (100 – 96)/16 = 0.25
Then we use the z table to find the area under the curve.
Area for Z1 = 0.354
Area for Z2 = 0.599
The probability that the mean of the groups age is between 90 and 100 months can be found as follows:
0.599 – 0.354 = 0.245
Answer:
140%
Step-by-step explanation:
To write a percentage we need a number over 100.
We can first set up two ratios:
![\frac{35}{25}=\frac{x}{100}](https://tex.z-dn.net/?f=%5Cfrac%7B35%7D%7B25%7D%3D%5Cfrac%7Bx%7D%7B100%7D%20%20)
We can solve using cross multiplication (multiply the numerator of the first fraction with the denominator of the second fraction and multiply the numerator of the second fraction with the denominator of the first fraction)
3500=25x
Divide both sides by 25 to isolate x
x=140
140%
4260ft / 3 = 1420
The bridge is 1420 yards long
Answer:
50
Step-by-step explanation:
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