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const2013 [10]
3 years ago
11

According to a​ report, 51.6​% of murders are committed with a firearm. ​(a) if 200 murders are randomly​ selected, how many wou

ld we expect to be committed with a​ firearm? ​(b) would it be unusual to observe 122 murders by firearm in a random sample of 200 ​murders? why?
Mathematics
1 answer:
dolphi86 [110]3 years ago
6 0

Answer:

a) 103, b) No

Step-by-step explanation:

a) We need to multiply the probability by the amount of the sample to get:

200 × 51.6% = 103.2, rounded down to 103

b) As we have selected the people randomly, we have no control over the type of people we are given - this is theoretical and the estimate is not definite - all of the sample could have murdered by firearm or even none (even though it is highly unlikely).

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543,000,000,000,000 in Scientific notation
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Answer:

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Step-by-step explanation:

Scientific notation, the number must always be less than 10, in this case 5.43. The exponent represents how much times I moved the decimal point to the left.

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Step-by-step explanation:

We know that if (h,k) is the center of any circle and whose radius is = r then its equation is :

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A store is selling a mixture of apple granola and blueberry granola for $6.99 per pound. Blueberry granola costs $8.99 per pound
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Answer:the number of pounds of blueberry granola that she should put in the mixture is 10 pounds.

the number of pounds of apple granola that she should put in the mixture is 20 pounds

Step-by-step explanation:

Let x represent the number of pounds of blueberry granola that she should put in the mixture.

Let y represent the number of pounds of apple granola that she should put in the mixture.

She wants to make a 30 pounds mixture. This means that

x + y = 30

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