If A=(9,18) and B=(1,12), what is the length of AB?

A school wants to buy a chalkboard that measures 4 feet by 6 feet. The chalkboard costs $10.00 per square foot. How much will th

Harlamova29_29 [7]

Answer:

$27.87

Step-by-step explanation:

if it is 1 by 2 you would multiply 1 x 2 and get 2 then multiply 13.87 x 2 to get 27.87 and it leaves you with $27.87

7 0

2 years ago

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7b6+12b6 if canot be simplified

kramer

Because b^6 is present in both terms, we can factor it out.

b^6(7 + 12)

Combine like terms.

b^6(19)

Rearrange.

19b^6 is the fully simplified form of the given expression.

6 0

2 years ago

Do you know the answer to this question

Vika [28.1K]

Answer:

125$ worth because you would not spend it all if you picked 625 and the others would give way too many away

4 0

2 years ago

What is 6 times 4/9?

Ainat [17]

2.666. The 6 is repeating

3 0

2 years ago

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Of 1000 randomly selected cases of lung cancer, 823 resulted in death within 10 years.

Arada [10]

Answer:

a) $0.823 - 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.799$

$0.823 + 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.847$

The 95% confidence interval would be given by (0.799;0.847)

b) $n=\frac{0.823(1-0.823)}{(\frac{0.03}{1.96})^2}=621.79$

And rounded up we have that n=622

c) $n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11$

And rounded up we have that n=1068

Step-by-step explanation:

Part a

$\hat p=\frac{823}{1000}=0.823$

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by: