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tatiyna
2 years ago
9

What is the domain of f(x)=(1/2)^x

Mathematics
1 answer:
PSYCHO15rus [73]2 years ago
8 0

Answer:

Domain: all real numbers

Step-by-step explanation:

The domain of a function is the set of values that x can be replaced with.

In this function, x can be replaced by any real number, so the domain of the function is all real numbers.

plz mark me as brainliest :)

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X is normally distributed with a mean of 100 and a standard deviation of 15. What is the probability of randomly sampling a scor
VikaD [51]

Answer:

Using calculator: 0.0415

Using Z-score Table: 0.0418

Step-by-step explanation:

There are two ways you can solve this problem.

1. Use the normal distribution function on a calculator.

Entered values:

Lower Limit: 126

Upper Limit: 999999999999999... (To encompass all the data)

Standard Deviation: 15

Mean: 100

2. Find the Z score and look up probabilities on table.

Formula for Z score:

Z=\frac{x-mean}{standard deviation} \\\\Z= \frac{126-100}{15}=1.7333...

Z = 1.7333

This means that the value 126 is 1.733 standard deviations away from the mean. We can look this value up on the Z table to find its corresponding probability.

This will show us the probability of the random sampling being equal to or lower than 126.

P = 0.9582

So to find the probability of it being above, we simply just calculate the inverse as all probabilities on the curve = 1.

1-0.9582 = 0.0418

NOTE: Values found from the table will usually be a bit different from if you find it from a calculator, the one you need will depend on the method you use in class.

Hope this helped!

6 0
2 years ago
The temperature was t°F. It fell 8°F and is now 32°F. What was the original temperature?
e-lub [12.9K]
Its 40 you basically add it kus if it gets colder than the temperature must of been higher so you add
4 0
3 years ago
Shade 1/3 of this pie
padilas [110]
Split the pie into 3 sections and shade only one of them

3 0
3 years ago
Read 2 more answers
Lisa made $165 for 11 hours of work. At the same rate, how much would she make for 13 hours of work? Pls help​
ss7ja [257]

Answer: 195

Step-by-step explanation: Well first you would do 165 divided by 11 to find the rate. Then multiply what you got as your rate by 13. Then you would get 195.

3 0
3 years ago
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2 numbers total 47 and have a difference of 21 what are the two numbers
murzikaleks [220]

x+y = 47

x-y = 21

------------  add together

2x =68  divide by 2

x=34

x+y = 47

34+ y = 47

subtract 34 from each side

y = 13

the two numbers are 34 and 13


7 0
3 years ago
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