Answer:
Circumference = 2 * radius * 3.14
82.14 = 2*3.14 r
r= 82.14/6.28=13.079 cm.
So the area = 3.14 r^2
3.14*13.079^2
537.129 cm ^2
Hope this helps :)
Step-by-step explanation:
The life span of the battery can be expected 98% of the batteries to meet the guarantee will be 149.3 hours.
<h3>What is the z-score?</h3>
The z-score is a statistical evaluation of a value's correlation to the mean of a collection of values, expressed in terms of standard deviation.
The z-score is given as
z = (x - μ) / σ
Where μ is the mean, σ is the standard deviation, and x is the sample.
Many electronic devices use disposable batteries, which eventually have to be replaced.
The mean is 140 hours and the standard deviation is 4 hours.
The marketing department wants to write a guarantee for the battery life.
The life span of the battery can be expected 98% of the batteries to meet the guarantee will be
Then the z value for 98% is 2.326.
Then the life span will be
2.326 = (x - 140) / 4
9.304 = x - 140
x = 149.3 hours
The life span of the battery can be expected 98% of the batteries to meet the guarantee will be 149.3 hours.
More about the z-score link is given below.
brainly.com/question/15016913
#SPJ1
the answer that I came up with is (c)
Answer:
enlargement
Step-by-step explanation:
<em>hope this helps. i am in algebra two so you can trust my answer. happy holidays and stay safe</em>
<em />
Berto can purchase
12/3.75 gallons, this is 3.2 gallons of gas. So the coordinate on
this line would be (3.2, 12).
Good Luck! :D
