2 years ago

The amount of time a certain brand of light bulb lasts is normally distributed with a

Mathematics

1 answer:

Alisiya [41]2 years ago

4 0

Answer:

23.47 % ( or .2347)

Step-by-step explanation:

780 is 20/50 = .4 for z score - .4

810 is 10/50 = .2 z-score = .2

Use z-score table .5793 - .3446 = .2347 23.47%

You might be interested in

What is 2<img src="https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B5%7D" id="TexFormula1" title="\frac{1}{5}" alt="\frac{1}{5}" align="

vivado [14]

$2\dfrac{1}{5}+1\dfrac{1}{10}=2+\dfrac{1}{5}+1+\dfrac{1}{10}=(2+1)+\left(\dfrac{1}{5}+\dfrac{1}{10}\right)\\\\=3+\left(\dfrac{1\cdot2}{5\cdot2}+\dfrac{1}{10}\right)=3+\left(\dfrac{2}{10}+\dfrac{1}{10}\right)=3+\dfrac{2+1}{10}=\boxed{3\dfrac{3}{10}}$

7 0

3 years ago

What is the simplest form of this expression? (x + 7)(3x − 8)

Komok [63]

Answer: 3x^+13x-56
Steps
1). Multiply the parentheses
(X+7)(3x-8)
=X x 3x -8x+7 x 3x -7 x 8
2). Multiply
3x^-8x + 21x - 56
3). Do like terms
3x^+13x - 56
4). Solution
[3x^+13x - 56]

-HOPE THAT HELPEDED <3

4 0

4 years ago

1-07 What is the length of the marked portion of each line segment? Copy the

VikaD [51]

Answer:

A. 25 B. 45 C. 30

Step-by-step explanation:

75 ÷ 3 = 25

25 × 1 = 25

75 ÷ 5 = 15

15 × 3 = 45

50 ÷ 5 = 10

10 × 3 = 30

5 0

3 years ago

A certain drug dosage calls for 8 mg per kg per day and is divided into two doses (1 every 12 hours). If a person weighs 82 poun

frez [133]

Step-by-step explanation:

Dosage per kg per day = 8mg

2 doses = 4mg

If a person weighs 82 pounds =? mg

1kg = 2.205 pounds

So 82 ÷ 2.205 = 37. 195 kg

So he should receive 37. 195 mg every 12 hours

3 0

3 years ago

What's the answer and explain how

gavmur [86]

Answer:

life

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers