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liberstina [14]
3 years ago
8

The life expectancy of a typical lightbulb is normally distributed with a mean of 2,100 hours and a standard deviation of 40 hou

rs. What is the probability that a lightbulb will last between 1,965 and 2,165 hours?
Mathematics
1 answer:
kodGreya [7K]3 years ago
3 0
\mathbb P(1965
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7+7x=-70 what is the answer?
LenKa [72]

Answer: (-11)

Step-by-step explanation: 7+7x=-70

7-7+7x=-70-7

7x=-77

-77/7=-11

4 0
3 years ago
Find the balance in an account with $7,000 principal earning 5% interest compounded quarterly
nadya68 [22]

Answer:

The balance is \$11,505.34  

Step-by-step explanation:

we know that    

The compound interest formula is equal to  

A=P(1+\frac{r}{n})^{nt}  

where  

A is the Final Investment Value  

P is the Principal amount of money to be invested  

r is the rate of interest  in decimal

t is Number of Time Periods  

n is the number of times interest is compounded per year

in this problem we have  

t=10\ years\\ P=\$7,000\\ r=0.05\\n=4  

substitute in the formula above  

A=\$7,000(1+\frac{0.05}{4})^{4*10}=\$11,505.34  

3 0
3 years ago
The price of milk increased from $2 to $2.50. What is the percent of change for the price of milk?
Alina [70]

25.00%

Or

25c

Have a Merry Christmas!

5 0
3 years ago
Find the volume of this cylinder.
Aleonysh [2.5K]

Cylinder's volume = 1330.5 cm^3

Step-by-step explanation:

radius, r = diameter, d / 2

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= 5.5 cm

Volume = π r^2 h

= π × 5.5^2 × 14

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= 1330.5 cm^3

3 0
3 years ago
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What do u want me to solve there is no photo
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