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34kurt
2 years ago
7

If the probability of a newborn kitten being female is 0.5, find the probability that in 100 births, 55 or more will be female.

Use the normal distribution to approximate the binomial distribution.
a) 0.8159

b) 0.7967

c) 0.1841

d) 0.0606
Mathematics
1 answer:
amid [387]2 years ago
3 0

Answer:

the answer is A your welcome

Step-by-step explanation:

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Mrs. Smith asked her students to make observations about the histogram, Annual Rainfall of Cities.
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Maria and Antonio

Step-by-step explanation:

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2 years ago
Solve 2cos ²y -siny -1=0 for 0° ≤y≤360°
natima [27]

 

\displaystyle\bf\\2cos^2y -sin\,y -1=0~~~for~~0^o\leq y \leq360^o\\\\cos^2y=1-sin^2y\\\\2(1-sin^2y) -sin\,y -1=0\\\\2-2sin^2y-sin\,y-1=0\\\\-2sin^2y-sin\,y+2-1=0\\\\-2sin^2y-sin\,y+1=0~~~\Big|\times(-1)\\\\2sin^2y+sin\,y-1=0

.

\displaystyle\bf\\\boxed{\bf sin\,y=x}\\\\2x^2+x-1=0\\\\x_{12}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}=\frac{-1\pm\sqrt{1-4\cdot2\cdot(-1)}}{2\cdot2}=\\\\=\frac{-1\pm\sqrt{1+8}}{4}=\frac{-1\pm\sqrt{9}}{4}=\frac{-1\pm3}{4}\\\\x_1=\frac{-1+3}{4}=\frac{2}{4}=\boxed{\bf\frac{1}{2}}\\\\x_2=\frac{-1-3}{4}=\frac{-4}{4}=\boxed{\bf-1}\\\\sin\,y=\frac{1}{2}\\\\\boxed{\bf y_1=\frac{\pi}{6}~~or~~(30^o)}\\\\\boxed{\bf y_2=\frac{5\pi}{6}~~or~~(150^o)}\\\\sin\,y=-1\\\\\boxed{\bf y_3=\frac{3\pi}{2}~~or~~(270^o)}

 

 

5 0
2 years ago
There are two unknowns you are trying to find, and you cannot express one in terms of the other. Describe how you could use alge
serious [3.7K]

Answer:

When you solve systems with two variables and therefore two equations, the ... of any variable is 1, which means you can easily solve for it in terms of the other ... In the substitution method, you use one equation to solve for one variable and ... Look for a variable with a coefficient of 1 … that's how you'll know where to begin.

Step-by-step explanation:

4 0
3 years ago
Could you help me with the ones I left blank? Also if i gkt one wrong tell me?
Rus_ich [418]
The name of parts of body???
7 0
3 years ago
There 77 students 7:4
melisa1 [442]

Answer:

49:28

Step-by-step explanation:

7+4=11

77/11=7

7*7=49

4*7=28

6 0
3 years ago
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