Hi there! :)
Answer:
Step-by-step explanation:
Formula for the area of a circle:
Rearrange the equation in terms of "r":
Divide 'π' from both sides:
Take the square root of both sides:
Answer:
$48
Step-by-step explanation:
Ashton is saving money for a new bike. He needs 120$ But only has saved 60% so far. How much more money does he need to buy the scooter
Ashton needs money for new bike=120$
savings of ashton is 60 % of his bike cost
hence 60% of 120 dollar will be
His saving=(60/100)*120=7200/100=72$
remaining cost will be obtained by subtracting saved money from total cost
total cost=120 dollar
saved money=72dollar
hence
Remaining more money he needed is =120-72=48$
Answer:
around 60 kids chose to recycle
Step-by-step explanation:
20% of 300 = 60
Either an increase of strength or from a machine
Answer:
<u>B. There is sufficient evidence that the mean of the pressure required to open a certain valve has changed. </u>
Step-by-step explanation:
We make this conclusion based on these reasons:
- We are told that the "null hypothesis was rejected" after the <em>"manager feels that the pressure variability has changed.,</em> meaning the <u>null hypothesis was the opposite of what occurred; that is to say, it is the alternate hypothesis that proved true instead.</u>
- <em>"changes in the manufacturing process"</em> form what can be called "sufficient evidence" that the mean of the pressure required to open the valve has changed, thereby going against the null hypothesis.
It is based on the above reasons that the null hypothesis was rejected.
