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3 years ago

The mean and standard deviation of a normal distribution are 150 and 12 respectively. What percentage of values lie between:

Mathematics

2 answers:

Semenov [28]3 years ago

8 0

Answer:

Step-by-step explanation:

Use a calculator with built-in statistical functions. The function applying here is normcdf(, the "cumulative density function."

(a) The percentage of values lying between 138 and 162 is

norm(138,162, 150, 12), which comes out to 0.683, or 68.3%.

(b) Find norm(126, 174, 150,12): 0.945, or 94.5%

(d) Find norm(162, 174,150,12): 0.136, or 13.6%

Lana71 [14]3 years ago

5 0

The answer would be d

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PLS HELP WILL AWARD BRAINLIST!!!! PLS HELP DUE Tomorrow

Serhud [2]

Answer:

72º

Step-by-step explanation:

Angles at a point = 360º

Number of wedges = 5

Angle of each wedge

= 360 ÷ 5

= 72º

3 0

3 years ago

Which is the angle of elevation from the submarine to the boat? <1, <2 ,<4 <3

grigory [225]

Answer:

Step-by-step explanation:

When an observer is at the same level with the submarine, his line of sight above the horizontal upward to the boat would form an angle called the angle of elevation.

Thus, the angle of elevation from the submarine to the boat is marked as <1. <1 is the angle of elevation from the submarine.

6 0

3 years ago

When adding two numbers, such as 123 and 423, care is taken to first line them up and then add like digits. How does expanding t

zavuch27 [327]

Think of 10^2, 10^1, and 10^0 as x^2, x^1, and x^0.
When you add polynomials, you can only combine like terms.
When you add expanded numbers, you can only combine like powers of 10.

123 + 423 =

= (100 + 20 + 3) + (400 + 20 + 3)

= (1 * 10^2 + 2 * 10^1 + 3 * 10^0) + (4 * 10^2 + 2 * 10^1 + 3 * 10^0)

= (1 * 10^2 + 4 * 10^2) + (2 * 10^1 + 2 * 10^1) + (3 * 10^0 + 3 * 10^0)

= 5 * 10^2 + 4 * 10^1 + 6 * 10^0

= 500 + 40 + 6

= 546

7 0

2 years ago

The lengths of the sides of a triangle are 7, 24, and 26. Decide whether or not this is a right triangle.

GenaCL600 [577]

Answer:

Not a right-angle triangle

Step-by-step explanation:

26² = 24² + 7²

676 = 576 + 49

676 = 625 is not a true statement.

So not a right angle triangle

8 0

3 years ago

The Soup Shack usually makes tomato soup with 999 tomatoes for every 121212 bowls of soup. Today, they made 888 bowls of soup wi

marin [14]

Answer:

Same quanitity.

Step-by-step explanation:

The Soup Shack usually makes tomato soup with 9 tomatoes for every 12 bowls of soup.

Today, they made 8 bowls of soup with 6 tomatoes.

We need to compare today's soup to the usual recipe.

For 9 tomatoes for every 12 bowls of soup = $\dfrac{9}{12}=\dfrac{3}{4}$

For 8 bowls of soup with 6 tomatoes = $\dfrac{6}{8}=\dfrac{3}{4}$

It means we can see that both the soup has the same quantity. Hence, this is the required solution.

4 0

2 years ago