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Anettt [7]
2 years ago
10

A bathtub can hold up to 70 gallons of water. The bath tub drains at a constant rate. when you first see the bath tub, it has 42

gallons of water in it. Three minutes later it has 14 gallons left in it. Use a signed number, and include the unit of measurement in your answer.
a. at what rate is the amount of water changing each minute?

b. How many more minutes will it take for the tub to drain completely?

c. How many minutes before you arrived was the tub completely full?
Mathematics
1 answer:
Darina [25.2K]2 years ago
5 0

Answer:

A. 28

B. 1 min

C. 2 mins

Step-by-step explanation:

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A. What is an equation of the line with slope -1/2 and y-intercept 2??
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Answer:

y = -(1/2)x + 2

Step-by-step explanation:

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3 years ago
Fluoxetine, a generic anti-depressant, claims to have, on average, at least 20 milligrams of active ingredient. An independent l
san4es73 [151]

Answer:

t=\frac{18.7-20}{\frac{5}{\sqrt{80}}}=-2.326    

df=n-1=80-1=79  

p_v =P(t_{(79)}  

Step-by-step explanation:

Information given

\bar X=18.7 represent the sample mean for the content of active ingredient

s=5 represent the sample standard deviation for the sample  

n=80 sample size  

\mu_o =20 represent the value that we want to test

t would represent the statistic

p_v represent the p value for the test

System of hypothesis

We need to conduct a hypothesis in order to check if the true mean for the active agent is at least 20 mg, the system of hypothesis would be:  

Null hypothesis:\mu \geq 20  

Alternative hypothesis:\mu < 20  

The statistic would be:

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

Now we can calculate the statistic:

t=\frac{18.7-20}{\frac{5}{\sqrt{80}}}=-2.326    

P value

The degrees of freedom are calculated like this:

df=n-1=80-1=79  

Since is a one left tailed test the p value would be:  

p_v =P(t_{(79)}  

6 0
3 years ago
Palawbhehrht awnser yes or mo
wariber [46]

Answer:

yes

Step-by-step explanation:

4 0
2 years ago
Lowest fraction using common term<br><br> 28/35
rjkz [21]
28/7=4
35/7=5
4/5
A: 4/5
3 0
3 years ago
6. Tony is going to buy a new bike. The bike costs $120.50. If Tony uses a 25% coupon how much will he
Kruka [31]

Answer:

$90.38

Step-by-step explanation:

25% of $120.50 is $30.125

$120.50 - $30.125 = $90.375 rounded to $90.38

6 0
3 years ago
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