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3 years ago

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Samuel must choose a 4-digit PIN number. The first 2 digits must be numbers cannot repeat. The 3 and 4th digits are letters that

cannot repeat. How many different pins are possible with these restrictions?
A. 58,500
B. 70
C. 46,800
D. 72

1 answer:

tatuchka [14]3 years ago

7 0

(A. 58,500

Answer
A
A

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ehidna [41]

Answer:

A. the distance between points W and X

Step-by-step explanation:

<u><em>Looking for the distance of 5 units</em></u>

A. the distance between points W and X

-3 - (-8) = -3 + 8 = 5
Correct

B. the distance between points X and Y

1 - (-3) = 1 + 3 = 4 < 5
Incorrect

C. the distance between points X and Z

5 - (-3) = 5 + 3 = 8 > 5
Incorrect

D. the distance between points Y and Z

5 - 1 = 4 < 5
Incorrect

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2 years ago

attashe74 [19]

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3 years ago

Read 2 more answers

Help, this is a khan question so you may have done it before

Readme [11.4K]

Answer:

Eric, 9.8 meters.

Step-by-step explanation:

Use the distance formula with the given coordinate and each of the other coordinate.

$\sqrt{(10-3)^{2}+(8-2)^{2} }$ Brooke

$\sqrt{(-6-3)^{2}+(6-2)^{2} }$ Eric

$\sqrt{(8-3)^{2}+(-6-2)^{2} }$ Cam

You'll see that Eric kicked the furthest distance with a distance of 9.8 meters.

Brooke kicked 9.2 meters and Cam kicked 9.4 meters. What does the distance formula really mean? When you solve for the distance between two points, you're really just creating a triangle between those two points, and you're actually looking for the hypotenuse. The slope that intersects your two points is the hypotenuse of the triangle you created.

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2 years ago

Can you please help me!!! I need this answered before midnight

Allisa [31]

4x=9y+2
x=(9y+2)/4
11x-8=90+9y+2
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(99y+22)/4=9y+100
99y+22=36y+400
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is the question asking for y or x？？or is it asking for angle

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2 years ago

According to a study done by Wakefield Research, the proportion of Americans who can order a meal in a foreign language is 0.47.

UNO [17]

Answer:

Probability that the proportion of Americans who can order a meal in a foreign language is greater than 0.5 is 0.19766.

Step-by-step explanation:

We are given that according to a study done by Wake field Research, the proportion of Americans who can order a meal in a foreign language is 0.47.

Suppose a random sample of 200 Americans is asked to disclose whether they can order a meal in a foreign language.

<em>Let </em> $\hat p$ <em> = sample proportion of Americans who can order a meal in a foreign language</em>

The z-score probability distribution for sample proportion is given by;

Z = $\frac{ \hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ~ N(0,1)

where, $\hat p$ = sample proportion

p = population proportion of Americans who can order a meal in a foreign language = 0.47

n = sample of Americans = 200

Probability that the proportion of Americans who can order a meal in a foreign language is greater than 0.5 is given by = P( $\hat p$ > 0.50)

P( $\hat p$ > 0.06) = P( $\frac{ \hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ > $\frac{0.5-0.47}{\sqrt{\frac{0.5(1-0.5)}{200} } }$ ) = P(Z > 0.85) = 1 - P(Z $\leq$ 0.85)

= 1 - 0.80234 = <u>0.19766</u>

<em>Now, in the z table the P(Z </em> $\leq$ <em>x) or P(Z < x) is given. So, the above probability is calculated by looking at the value of x = 0.85 in the z table which has an area of 0.80234.</em>

Therefore, probability that the proportion of Americans who can order a meal in a foreign language is greater than 0.5 is 0.19766.

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3 years ago