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3 years ago

assume that 70% of teenagers who go to take the written drivers license test have studied for the test. Of those who study for t

he test 95% pass; of the those who do not study for the test, 60% pass. what is the probability that a teenager who passes the written drivers license test did not study for the test?

Mathematics

1 answer:

wel3 years ago

7 0

$P = \frac{P(pass AND not study)}{P(pass AND study) + P(pass AND not study)} \\ \\ P = \frac{(.6)(.3)}{(.95)(.7) + (.6)(.3)} \\ \\ P = 0.213$

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Find all numbers with the given absolute value 1)12 2)1.7 3)3/5 4)3 1/6 5)0

telo118 [61]

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3 years ago

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otez555 [7]

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3 years ago

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PLEASE HELP MEEEEE!!!!!!!

OverLord2011 [107]

Answer:

Cheese: $4\frac{3}{8}$
Milk: $1\frac{2}{3}$
Pasta: $6\frac{1}{4}$

Step-by-step explanation:

Cheese:

$1\frac{3}{4} = \frac{7}{4}$
Set up a proportion: $\frac{\frac{7}{4} }{4} = \frac{x}{10}$
Cross multiply, then divide: 10 × 7/4 = 17.5, 17.5 ÷ 4 = 4.375
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Milk:

Set up a proportion: $\frac{\frac{2}{3} }{4} = \frac{x}{10}$
Cross multiply, then divide: 10 × 2/3 = $6\frac{2}{3}$ , $6\frac{2}{3}$ ÷ 4 = $1\frac{2}{3}$

Pasta:

$2\frac{1}{2} = \frac{5}{2}$
Set up a proportion: $\frac{\frac{5}{2} }{4} = \frac{x}{10}$
Cross multiply, then divide: 10 × 5/2 = 25, 25 ÷ 4 = 6.25
$6.25 = 6\frac{1}{4}$

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3 years ago

7.7.33

GenaCL600 [577]

We know that

At sea level, the height is 0 and
the pressure is 98 kilopascals

At 1000 ft, the height is 1000 and
the pressure decreases about 11.41%

i(100%-11.41%)/100----> (0.8859)

therefore
1) at 1000 ft--------> the pressure is 98*(0.8859)----------> 86.82 kilopascals
2) at 2000 ft--------> the pressure is 86.82*(0.8859)-------> 76.91 kilopascals
3) at 3000 ft--------> the pressure is 76.91*(0.8859)-------> 68.14 kilopascals
4) at 4000 ft---------> the pressure is 68.14*(0.8859)-------> 60.36 kilopascals

the answer is
The pressure at an altitude of 4000 m is about 60.36 kilopascals

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3 years ago