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icang [17]
3 years ago
15

If total length of boundary of a circle is 220m. find its diameter​

Mathematics
1 answer:
Aleonysh [2.5K]3 years ago
4 0

Answer:

3850m^2

Step-by-step explanation:

hope this helps

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Police departments use exams as part of their promotion process and officers have to score higher than 80% of those taking the t
Rashid [163]

Answer:

z score for officer1 is 1, he will be promoted.

z score for officer2 is 0.33, she will not be promoted.

Step-by-step explanation:

Officer 1 get 74 points. O1=74

Officer 2 get 68 points. O2=68

Mean of the exam is 65 and standart deviation is 9 . M=65 and s=9

1) z-score for O1 can be found using the formula:

\frac{74-65}{9} =1

2) z-score of O2 is

\frac{68-65}{9} =0.33

Promotion is gained if an officer (O), scores higher than 80% of the officers taking the exam. This means they need to be at least in the top 20% of the exam. Therefore we look for the corresponding z score for the P(z)=0.2 which is 0.8416. Since z-score of O1 is bigger that 0.8416, he promotes. Officer2 who got 68 from the exam cannot promote since corresponding z-score is less than 0.8416

4 0
3 years ago
PLEASE HELP ASAP!
valentinak56 [21]
C is the answer to it
3 0
3 years ago
Read 2 more answers
URGENT!!!!!
Anna11 [10]

h=20w

in one week hector works 20 hours

in two hector works 40 etc


h = hours and w = weeks. the money is just extra information.

h=20w works because if it has been two weeks we substitute the w with the number 2 and can solve

h=20(2)

h=20x2

h=40

This proves that the equation is true

7 0
3 years ago
In a​ week, a man received a paycheck for ​$826.60. The withholding for taxes was ​$91.40. If he worked 34 hours in that​ week,
sleet_krkn [62]

Answer:

Step-by-step explanation:

3 0
2 years ago
Everett goes for a morning run. He starts running
Andru [333]

Answer:

I think it is the right clock wise?

7 0
3 years ago
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