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Contact [7]
3 years ago
13

If p(a)=0.24 and p(b)=0.52 and a and b are independent, what is p(a or b)?

Mathematics
1 answer:
Crank3 years ago
3 0
Download the app photo math and there is the answer
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An APD Police officer has to write at least 80 speeding
GenaCL600 [577]

Answer:

x=\geq80-27

Step-by-step explanation:

there is needed atleast 80 tickets and you've given 27 so you would need a minimum of 53 tickets to make the inequilaty true

6 0
3 years ago
Assume that adults have iq scores that are normally distributed with a mean of 100100 and a standard deviation of 15. find the t
anastassius [24]
The bell curve attached below shows the normal distribution of the data.

We are looking the value of X such as the area to its left gives the probability of 0.75

We first need the z-score which we can obtain by reading from the z-table (as shown in the second picture below)

The z-score is = 0.7734

Then we use the following formula to work out X
z-score = (X - Mean) ÷ Standard Deviation
0.7734 = (X - 100) ÷ 15
0.7734×15 = X - 100
11.601 = X - 100
X = 11.601 + 100
X = 111.601 ≈ 112 

Hence the third quartile is 112

4 0
2 years ago
I have "Write an equation for each problem. Then solve the equation.
Umnica [9.8K]

Answer:

9

Step-by-step explanation:

if the opposition of a number is equal to -9.

hence the expression above....

6 0
2 years ago
The amount in kilograms, a, of a radioactive element that remains after t hours can be modeled by the equation a= 0.65(0.92)to t
elena-14-01-66 [18.8K]

Answer:

The rate of decrease is 8%

Step-by-step explanation:

we know that

The general equation for the radioactive decay can be written as:

a=a_0(1-r)^t

where

a is the amount in kilograms after time t.

a_0 is the original amount of the substance or y-intercept of the function

r is the decay rate, written in decimals.

t is the time

In this problem we have

a=0.65(0.92)^t

so

a_0=0.65\\(1-r)=0.92

solve for r

r=1-0.92=0.08

Convert to percentage

0.08(100)=8\%

6 0
3 years ago
Solve the following equation for x.<br> 15x^2 – 46x + 16 = 0
goldfiish [28.3K]

Answer:

X=2/5,8/3

Step-by-step explanation:

Look on Tiger Algebra for step by step. JUst put the problem into g-oogle.

3 0
2 years ago
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