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Advocard [28]
2 years ago
15

The amount of time a certain brand of light bulb lasts is normally distribued with a mean of 900 hours and a standard deviation

of 55 hours. Out of 720 freshly installed light bulbs in a new large building, how many would be expected to last between 800 hours and 1030 hours, to the nearest whole number?
Mathematics
1 answer:
max2010maxim [7]2 years ago
7 0

Answer: 689

Step-by-step explanation:

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Which expression has a value of 36?
IrinaK [193]

The answer is A or C

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3 years ago
2. After the relay race, Larry, Curly, and Moe went to the
jarptica [38.1K]

Using proportions, it is found that each of the 6 people got $0.5.

<h3>Proportions:</h3>
  • This question is solved by <em>proportions</em>, using a rule of three.
  • $3.00 is shared between 6 people, which are Larry, Curly, Moe, Alvin, Simon and Theodore. How much did each people(1 person) get?

The <em>rule of three</em> is:

$3.00 - 6 people

$x - 1 person

Applying cross multiplication:

6x = 3

x = \frac{3}{6}

x = 0.5

Each of the 6 people got $0.5.

To learn more about proportions, you can take a look at brainly.com/question/24372153

7 0
2 years ago
If a puppet requires 3/4 yard of material, how many puppets can be made from 9 yards of material?
klasskru [66]
First find out how many times 3/4 yard goes into 9. 3/4 fits into 9 twelve times, so twelve puppets can be made.

Did I help? Thank me by clicking best answer!
5 0
3 years ago
Read 2 more answers
Bill has enough money to buy no more than 1/2 pound of cheese. how much cheese could he buy?
quester [9]
Let
 x: amount of pounds of cheese that Bill can buy.
 We can write the following inequation for this problem
 x <= 1/2
 Therefore, Bill could buy up to 1/2 pound of cheese.
 answer
 1/2 pound of cheese (maximum)
7 0
3 years ago
Complete the number sentence to solve. Enter the answer in simplest form. Four students share 6 granola bars equally. How many g
nata0808 [166]

Answer:

1.5 bars of granola per student

Step-by-step explanation:

Number of students = 4

Number of granola bars = 6

Four students share 6 granola bars equally.

Each student gets = 6 ÷ 4

= 1 1/2

= 1.5 bars of granola per student

Each student's share is 1.5 granola bars.

3 0
2 years ago
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