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3 years ago

I need help please. Also check out my other question

Mathematics

1 answer:

siniylev [52]3 years ago

5 0

Answer:

Explanation:

I'm going to turn the fractions into decimals

2 ½: 2.5

3 ⅕: 3.2

Formula for the area of a parallelogram: A = b(h)

Base: 3.2

Height: 2.5

3.2 · 2.5 = 8

<h3><u>The area of the parallelogram is 8 Km.</u></h3>

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The formula for the volume of a cone is V=1/3bh<br> Solve V=1/3bh<br> for b, the base of the cone.

Stels [109]

Answer:

b = 3Vh

Step-by-step explanation:

When they ask to solve for b, you are essentially rearranging the equation so that b is alone on one side.

V = 1/3bh

(V)(3) = (1/3bh)(3)

3V = bh

(3V)/h = (bh)/h

3Vh = b

b = 3Vh

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3 years ago

The First National Bank of Wilson has 600 checking account customers. Recent sample of 50 of these customers show 29 have a visa

uranmaximum [27]

Answer:

$0.58 - 1.64\sqrt{\frac{0.58(1-0.58)}{50}}=0.466$

$0.58 + 1.64\sqrt{\frac{0.58(1-0.58)}{50}}=0.694$

The 90% confidence interval would be given by (0.466;0.694)

Step-by-step explanation:

The estimated proportion of interest would be:

$\hat p=\frac{29}{50}= 0.58$

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 90% of confidence, our significance level would be given by $\alpha=1-0.90=0.1$ and $\alpha/2 =0.05$ . And the critical value would be given by:

$z_{\alpha/2}=-1.64, z_{1-\alpha/2}=1.64$

The confidence interval for the mean is given by the following formula:

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

If we replace the values obtained we got:

$0.58 - 1.64\sqrt{\frac{0.58(1-0.58)}{50}}=0.466$

$0.58 + 1.64\sqrt{\frac{0.58(1-0.58)}{50}}=0.694$

The 90% confidence interval would be given by (0.466;0.694)

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4 years ago

The sum of two numbers is 84. The difference of the two numbers is 32. What are the two numbers.

eimsori [14]

Answer:

The sum of two numbers is 84:

u + y = 84

The difference of the two numbers is 32:

u - y = 32

7 0

3 years ago

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The excluded values of a rational expression are –3, 0, and 8. Which of the following could be this expression?

e-lub [12.9K]

Excluded values are -3, 0 and 8, so denominator will be:

$(x-(-3))\cdot(x-0)\cdot(x-8)=(x+3)\cdot x\cdot(x-8)=(x+3)(x-8)x=\\\\=(x^2-8x+3x-24)x=(x^2-5x-24)x=\boxed{x^3-5x^2-24x}$

Answer A.

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4 years ago

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What is the percentage of 13/18?

anzhelika [568]

The percentage of $\frac{13}{18}$ would be $0.72222...$

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4 years ago