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<em>-</em><em> </em><em>BRAINLIEST</em><em> answerer</em>
The area of a circle is A = πr^2. We let A1 And A2 the areas of the circles and r1 and r2 the radius of each, respectivley.
A1 + A2 = 80π
Substitute the formula for the area,
π(r1)^2 + π (r2)^2 = 80π
From the statement, we know that r2=2(r1).
<span>π(r1)^2 + π (2 x r1)^2 = 80π
</span>We can cancel π, we will have
5 x (r1)^2 = 80
Thus,
r1 = 4 and r2 = 8
To calculate expected value,
We can add up the probability of all possible events.
The 2 possible events are either winning $50 or losing the prize, which is $ - 50
Expected value =
50 x 40 % + (-50) x 60%
= $-10
So the answer is $-10
The restaurant would have to give the free samples to its customers so that they would provide a feedback for the business.
<h3>What is feedback?</h3>
This is the word that is used to refer to the information that one has to create or give as way of reacting to the use of a product or of a new service.
This is a way of bringing about improvements or about bringing a new line into a new market. The customers in this case would have to tell the restaurant what they think about the new dish.
Read more on feedback here:
brainly.com/question/25653772
#SPJ1
It would take her 10.5 hours to drink the whole jug.
Step-by-step explanation:
Given,
Cups of water in jug = 7
Water drunk every hour = 
of cup
Let,
x be the number of hours.
According to given statement;
Multiplying both sides by 
It would take her 10.5 hours to drink the whole jug.
Keywords: fractions, multiplication
Learn more about fractions at:
#LearnwithBrainly
