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laiz [17]
3 years ago
15

Pregnancy length (in days) is a normally distributed random variable with a mean of 266 days and a standard deviation of 16 days

. Calculate the z-score for a pregnancy lasting 286 days. Do not round.
Mathematics
1 answer:
velikii [3]3 years ago
5 0

Answer:

it=552

Step-by-step explanation:

with rounding it = 550

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 2 m³ of soil containing 35% sand was mixed into 6 m³ of soil containing 15% sand. What is the sand content of the mixture?
Alex17521 [72]
.2 m^3 is 10 percent
.2 m^3 is 10 percent
.2 m^3 is 10 percent
.1 m^3 is 5 percent
therefore
.7m^3 is 35%

.6m^3 is 10%
.3 m^3 is 5%
so .9m^3 is 15 %

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6 0
3 years ago
The value of the expression 16 -3/4 is ______.
Korvikt [17]
16-3/4=15 1/4

You can convert to fractions first, and then convert back to a mixed number like:

16/1-3/4  and when you add/subtract fractions you need a common denominator

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61/4

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Or you can convert your fraction to a decimal to get:

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3 0
3 years ago
Read 2 more answers
Which equation does not represent a function? Why? A) y = x2; There are two outputs for each input. B) y2 = 4x; There are two ou
natita [175]

Answer:

B) y² = 4x; There are two outputs for each input

Step-by-step explanation:

For an equation to be called a function, the input values for x must only result in a single output for y.

Based on this definition if a function, the functions y = x², y = -x and y = x are all functions because for any value of x imputed in them, we can only get one equivalent value of y.

The only exception is the function y²= 4x

For this function, for any value of x, there will be more than one output for y. Take x = 1 for example

y² = 4(1)

y² = 4

y = ±√4

y = ±2

This shows that y = 2 and -2

Also if x = 4

y² = 4(4)

y² = 16

y = ±√16

y = ±4

y = 4 and -4

No matter the value of x imputed, the output value y will always be two (a positive and a negative value)

Hence, option B is correct.

3 0
4 years ago
What's 10x(2+3) divide by 5
Katarina [22]
10

2+3=5 10x5=50 50 divided by 5= 10
Hope this helps!
8 0
3 years ago
One bag contains three white marbles and five black marbles, and a second bag contains four white marbles and six black marbles.
Ket [755]
5/8 the first bag and 3/5 for the second bag.
7 0
3 years ago
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