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sergeinik [125]
3 years ago
13

The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 70 inches and a standard devia

tion of 10 inches. What is the probability that the mean annual snowfall during 25 randomly picked years will exceed (to the right) 72.8 inches? Write your answer as a decimal rounded to 4 places.
Mathematics
1 answer:
Sav [38]3 years ago
6 0

Answer:

The probabilty would be 87.34%

Step-by-step explanation:

Add all the numbers together and multiply them as a percetnage by four

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One student can paint a wall in 20 minutes. Another student can paint the same wall in 30 minutes. Working together, how long wi
Katarina [22]

1) in one minute for first  wiil be 1/20

the other 1/30, it means that  A paint in one minute  1/20 and B 1/30 then   A+B in one minute 1/20 + 1/30 = 3+2/60 = 5 / 60,  5/60 = 1/12

if in one min they make 1/12 then  in 12  min they  paint all the wall

5 0
3 years ago
Two numbers rolled can be added to get a sum. Find P(sum is even.)
azamat
When you roll two numbers you have four kinds of outcomes: EE, EO, OE, OO (where E = even, O = odd).

You get an even sum only if you sum two numbers that are both even or both odd, therefore the outcomes wanted are two: EE and OO.

Therefore:
P(sum is even) = 2 / 4 = 0.5

Hence, there is a 50% probability that, when you roll two numbers, their sum will be even.
6 0
2 years ago
Explain how to solve angle relationship problems
Nataly_w [17]

Answer:


Step-by-step explanation: Identify the angle relationships, set up the equation that will yield the unknown value, solve the equation for the unknown value, substitute the answer to determine the measurement of the angles then, check and verify your answer by measuring the angle with a protractor.


4 0
3 years ago
True or False, Explain your choice...<br><br>No irrational number are whole number​
bezimeni [28]
True… irrational numbers focus more around square roots that cant be simplified into a single number, or symbols like pi. while not all rational numbers are whole, an irrational number can never be whole.
4 0
3 years ago
56 POINTS! Find the area of the following figure. Explain how you got your answer.
AleksAgata [21]

Answer:

26.5 units²

Step-by-step explanation:

I am splitting the figure into a rectangle and two triangles to make this easier for me.

The rectangle is b•h so 5•4 = 20 units²

Area of triangle=1/2bh

The left triangle is \frac{1}{2}(3•3) ---> \frac{1}{2}(9) ---> 4.5 units²

The right triangle is \frac{1}{2}(2•2) --->\frac{1}{2}(4) ---> 2 units²

Then add it all up: 20+4.5+2 = <u>26.5</u><u> </u><u>units²</u>

3 0
2 years ago
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