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Kay [80]
3 years ago
12

You need to create a 4​-character password that consists of four English letters​ and/or digits if repetition is allowed. How ma

ny passwords can be created if zero cannot be used?
Mathematics
1 answer:
Nataly_w [17]3 years ago
3 0
123a
123q
123w
123e
123r
123t
123y
123u
123i
123o
123p
123s
123d
123f
123g
123h
123j
123k



I thought this would be easy lol, I tried, sorry for not getting an answer
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Solve for x. -3/5x+1/5>7/20
kakasveta [241]

Answer:

Step-by-step explanation:

15 + 720 is 1120

3 0
2 years ago
Shanna is planning a trip from Dallas, Texas, to San Diego, California. She knows that the distance she will travel is
enot [183]

Answer:

4.67 inches

Step-by-step explanation:

Shanna is planning a trip from Dallas, Texas, to San Diego, California.

She will travel about = 1,400 miles

The scale of a map is 300 miles = 1 inches

The trip of 1,400 miles = \frac{1400}{300}

                                    = 4.66666 inches ≈ 4.67 inches

Her trip is 4.67 inches far on the map.

3 0
3 years ago
Abbie babysits on the weekends. She charges $10 for the first hour and $6 for each
Dvinal [7]

Answer:

5 hours

Step-by-step explanation:

34-10(first hour) is 24

24/6(price per additonal hour)=4

so  theres four additional hours and the one OG hour so its 5 hours total

8 0
2 years ago
(a) An article in a medical journal suggested that approximately 14% of such operations result in complications. Using this esti
aev [14]

This question is incomplete, the complete question is;

Surgical complications: A medical researcher wants to construct a

99.5% confidence interval for the proportion of knee replacement surgeries that result in complications.

- An article in a medical journal suggested that approximately 14% of such operations result in complications. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.08?

Answer: a sample of operations needed is 149

Step-by-step explanation:

Given that;

confidence interval = 99.5% = 0.995 so

margin of error E = 0.08

p = 14% = 0.14

now we obtain the critical value of z t the 99.5 confidence interval

∝ = 1 - confidence interval

∝ = 1 - 0.995

∝ = 0.005

∝/2 = 0.0025

obtaining the area of probability in the right tail

Area of probability to the right is = 1 - 0.0025 = 0.9975

from probability table; critical value of t =2.81

using the formula

n = p( 1 - p ) [ (z_∝/2)/E)² ]

so we substitute  

n = 0.14 ( 1 - 0.14 ) [ 2.81 / 0.08 )²  

n = (0.14 × 0.86 ) × 1233.7656

n = 148.5453 ≈ 149

Therefore , a sample of operations needed is 149

4 0
3 years ago
How I divide by negative?? I forgot completely
allochka39001 [22]

Answer:

I hope this helps. If I misunderstood the question let me know

Step-by-step explanation:

1. When dividing a negative by a negative, your answer would be positive.

2. When dividing a negative by a positive, your answer will be negative.

3. When dividing a positive by a negative,your answer will be negative.

3 0
2 years ago
Read 2 more answers
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