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Liono4ka [1.6K]
4 years ago
11

In a sample of 7500 new iphones, 18 were found to be defective. at this rate, how many defective iphones would be expected in a

sample of 60000 new iphones? use a proportion to set up and solve this problem. write a complete answer including units
Mathematics
1 answer:
viva [34]4 years ago
8 0
In 7500 iPhones, 18 were found defective. 
18 of 7500 is 0.24%
0.24% of iPhones were defective.

Using the information above:
In a sample of 60000 new iPhones, 144 would be found defective.
144 of 60000 is 0.24%

Answer: 144 defective iPhones would be expected in a sample of 60,000.

Hope this helps! Good luck. :-)
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 <span>Formula for exponential decay is: 

N = No * e^-kt 

N = 1/2(45) = 22.5 

No = 45 

k = 0.1109 
The solution to your problem is as follows:

Let's try to solve the half-life if it is 45 grams, after which, you will now have an idea on how to solve the problem.

22.5 = 45 * e^(-0.1109t) 

1/2 = e^(-0.1109t) 

ln(1/2) = -0.1109t 

t = (ln(1/2))/(-0.1109) = 6.25 days


I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
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Although the question is incomplete, I have seen it before.

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A circular window is drawn on architectural plans where each unit is a foot on a coordinate grid. the window is modeled by the e
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The equation indicates that the center of the window is 12 feet from the ground and the distance the window spans 6 feet.

<h3>What is the general equation of a circle?</h3>

The equation of a circle is given by the formula,

(x-a)^{2} + (y -b)^{2} = r^{2}

where (a,b) is the coordinate of the center of the circle, and r is the radius of the circle.

According to the given equation, if we compare this equation with the general equation of the circle.

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(x-a)^{2} + (y -b)^{2} = r^{2}

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Thus, The equation indicates that the center of the window is 12 feet from the ground

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window span = 2r

= 2 × 3 (radius = 3)

= 6

Hence, The equation indicates that the center of the window is 12 feet from the ground and the distance the window spans 6 feet.

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