It takes 120 minutes for a hose to fill a swimming pool. If the pool drain is open, it takes 360 minutes to fill the pool. If the pool is full, the hose is off, and drain is open, how many minutes does it take to empty the pool?

Answers

Answer 1

Answer: I would look at this problem like this:

In those 360 the hose is working, and it's working the same as during the 120 when it filled the pool. Since 360 is three times 120, it means that it filled the pool three times this time. But the pool was only filled once!

This means that twice the pool was drained in those 360 minutes: this makes one draining every 180 minutes. - this is the answer!

Answer 2

Answer:

Answer:

180 minutes

Step-by-step explanation:

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A ball is dropped from a height of 30 feet. The ball bounces. After each bounce, the maximum height of the ball is 80% of the previous height. Write an nth term formula to model the situation and approximate the maximum height of the ball after 6 bounces.

Answers

das is sum of geometric sequence
first is 30
imagine it
ball droppes 30 feet
bounces up 80% of that
then it has to bounce down again
then up
down
therfor, we summ up from 30 to 6thbounce, times 2 and minus 30 since the first bounce didn't start from ground (will include diagram)

so therefor
2(sum)-30 is the answer

the sum of a geometric sequence is
$S_(n)= (a_(1)(1-r^(n)))/(1-r)$
where Sn is the sum to the nth bounce
a1=first term
r=common ratio
n=which term
Sn=S6 (6th bonce)
a1=30
r=80% or 0.8

sub

$S_(6)= (30(1-0.8^(6)))/(1-0.8)$
$S_(6)= 110.678$

we then double then minus 30
2*110.678=221.357
minus 30
221.357-30=191.357 feet

you should use
dropped from x feet and max height is m percent of previous heigh, find total distance after n bounces (convert m% to decimal)
answer= $2[ (x(1-m^(n))/(1-m) ]-x$

anyway, distance is 191.357 feet

1. Find the area. *
5 ft
12 ft
6 ft
16 ft

Answers

What am I supposed to find the area of??

Answer:136ft

Step-by-step explanation:

The Nguyen family spent $48 on entrance fees to the county fair. Each ticket for an adult cost $12. Each ticket for a child cost $5. Each senior citizen paid $2. There were six people in the group. There were 2 fewer tickets purchased for senior citizens than adult tickets. How many adult tickets were purchased?

Answers

i wanna say 3 but not sure

If two lines are parallel, which statement must be true?A. Their slopes are reciprocals.
B. Their slopes are opposites.
C. Their slopes are equal.
D. Their slopes are negative reciprocals.

Answers

I believe the correct answer from the choices listed above is option C. If two lines are parallel, their slopes are equal. Having equal slopes mean that the rise and run of the points of the lines are the same. Parallel lines do not intersect even when extended infinitely.

Answer:

C. Their slopes are equal.

Step-by-step explanation:

Given : If two lines are parallel.

To find : which statement must be true.

Solution : We have given that If two lines are parallel.

We know that two parallel line have same slope

By rise over run :

Therefore, C. Their slopes are equal.

If p is the hypothesis of a conditional statement and q is the conclusion, which is represented by ~p → ~q

Answers

If p is not the hypothesis of a conditional statement then q is not the conclusion

Which of these number is irrational?the square root of 36
the square root of 49
the square root of 13
the square root of 121

Answers

The answer is the square root of 13 because it is the only one that gets square rooted and does not come out even. Hope this helped.

The square root of 36 is 6, the square root of 49 is 7, the square root of 121 is 11. So the answer is the square root of 13.

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