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Luba_88 [7]
3 years ago
12

This graph shows fuel consumption for a car during a test run. Three of the statements are true. Which is NOT?

Mathematics
1 answer:
diamong [38]3 years ago
6 0

The answer I got was C = The car used 70 gallons of gas to go 3 miles.

Hope this helps.

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How long will it take to fill the pool if two hoses are used, one that fills at a rate of 40 gallons per hour and one that fills
jok3333 [9.3K]
One data is missing. You need the volume of the pool or some data that permit you to calculate this volume.

The same statement given by you is part of a problem where you know a series of data that shows the time required to fill the pool at different flow rates:

flow rate              time
60 gal/h               300 h => 60 gal/h * 300 h = 18,000 gal
45 gal/h               400 h => 45 gal/h * 400 h = 18,000 gal
36 gal/h               500 h => 36 gal/h * 500 h = 18,000 gal
30 gal/h               600 h => 30 gal/h * 600 h = 18,000 gal


So for, this pool to calculated (several times) that the volume is 18,000 gal.

Now you have two hoses one with a flow rate of 40 gal / h and the other with a  flow rate of 60 gal/h.

The total flow rate is the sum of the two flow rates"

total flow rate = 40 gal/h + 60 gal/h = 100 gal/h

And you just must divide the volume of the pool (18,000 gal) by the total flow rate (100 gal/h) to get the time to fill the pool:

time = volume / flow rate = 18,000 gal / 100 gal/h = 180 h.

Answer: 180h
5 0
3 years ago
What is the LCM of 56 and 504?
tatuchka [14]
The LCM is 2x2x2x7 factorized
6 0
3 years ago
Read 2 more answers
Find the opposite of 1/3 and negative -7/12
Dimas [21]
The opposite of 1/3 = -1/3
the opposite of -7/12 = 7/12
8 0
3 years ago
Suppose that we want to test the hypothesis with a significance level (alpha) of .05 that the climate has changed since industri
saw5 [17]

Answer: we reject the initial claim

(50. 3802, 51.6198)

Step-by-step explanation:

A)

The initial statement is that the mean temperature throughout history is 50°

This is the null hypothesis and it is denoted as H'

H': u = 50.

After taking a sample of 40 years, we realized that the mean temperature is 51°.

This is the alternative hypothesis, in contradiction to the alternative.

The alternative hypothesis is denoted as H1

H1: u > 50 ( upper tailed).

Sample size (n) = 40

Sample mean (x) = 51

Population standard deviation (σ) = 2

We use a z test to get the value of the test statistics.

We are using a z test because sample size is greater than 30 ( n = 40) and population standard deviation is given.

Z score = x - u/ (σ/√n)

Z score = 51 - 50 / (2/√40)

Z score = 1 / 0.3162

Z score = 3.16

Our level of significance is 5%, and the critical value at this level of significance is 1.645.

By comparing the z score relative to the critical value, since our z score is greater than 1.645, it implies that we are in the rejection region hence we reject the initial claim.

B)

We are to construct a 95% confidence interval for population mean temperature.

For upper limit

u = x + Zα/2 ×(σ/√n)

Where Zα/2 = 1.96 which is the critical value for a two tailed test at 5% level of significance.

For upper limit, we have that

u = 51 + 1.96 × (2/√40)

u = 51 + 1.96 (0.3162)

u = 51 + 0.6198

u = 51.6198.

For lower limit, we have that

u = 51 - 1.96 × (2/√40)

u = 51 - 1.96 (0.3162)

u = 51 - 0.6198

u = 50. 3802.

Hence the 95% confidence level for mean temperature is given as (50. 3802°, 51.6198°)

7 0
3 years ago
What is a larger unit ounce or pound?
vagabundo [1.1K]
A pound is larger then a ounce
3 0
3 years ago
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