4 years ago

26% of animals at the animals shelter are dogs. About what fraction of animals at the shelter are dogs

Mathematics

1 answer:

Mice21 [21]4 years ago

3 0

13/50 or 26/100 is the fraction :)

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Sienna tossed 10 heads when tossing a coin 24 times. What is the experimental probability of tossing heads?

vlabodo [156]

Answer:

5/6

Step-by-step explanation:

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3 years ago

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7. If f(x) = -8x +11, find f(-4).

kobusy [5.1K]

Answer:

Step-by-step explanation:

f(x) = -8x +11, for f(-4).

= -8(-4)+11

= 32 + 11

= 43

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3 years ago

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The life in hours of a 75-watt light bulb is known to be normally distributed with standard deviation σ = 25 hours. A random sam

irina [24]

Answer: a) (1008.34,1019.658) b) (1009.24,1018.76)

Step-by-step explanation:

Since we have given that

n = 75

mean = 1014 hours

Standard deviation = 25 hours

At 95% two sided , z = 1.96

So, confidence interval would be

$\bar{x}\pm z\dfrac{\sigma}{\sqrt{n}}\\\\=1014\pm 1.96\dfrac{25}{\sqrt{75}}\\\\=1014\pm 5.658\\\\=(1014-5.658,1014+5.658)\\\\=(1008.34,1019.658)$

(b) Construct a 95% lower confidence bound on the mean life.

z = 1.65

So, confidence interval would be

$\bar{x}\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1014\pm 1.65\times \dfrac{25}{\sqrt{75}}\\\\=1014\pm 4.76\\\\=(1014-4.76,1014+4.76)\\\\=(1009.24,1018.76)$

Hence, a) (1008.34,1019.658) b) (1009.24,1018.76)

4 0

4 years ago

5*10 divided by 30 -10

sp2606 [1]

The answer to your question would be -25/3

As decimal -8.333333

4 0

3 years ago

What are the values of x in the equation 4x2 + 4x - 3 = 0?

9966 [12]

Answer:

x= 0.5

or x= -1.5

Step-by-step explanation:

Let's solve your equation step-by-step.

4x2+4x−3=0

Step 1: Factor left side of equation.

(2x−1)(2x+3)=0

Step 2: Set factors equal to 0.

2x−1=0 or 2x+3=0

x= 1/2 or x= −3/2

5 0

3 years ago