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Masteriza [31]
3 years ago
13

My car gets 27 miles per gallon of gas. If I drive 513 miles, how many gallons of gas will I use?

Mathematics
1 answer:
Lisa [10]3 years ago
8 0

513/27 to find your answer

19 and 14/27 is your answer


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Each sheep has 4 legs and each chicken has 2 legs. If a farm boy counts 50 heads and 140 feet, how many sheep are there?
kap26 [50]

Answer:

20

Step-by-step explanation:

H+S=50

2H+4S=140

4H+4S=200

4H+4S=200-

2H+ 4S =140

2H=60

H=30

50-30=20

8 0
4 years ago
A bottle contains 2 liters of water. The bottle leaks 80 milliliters of water every 3 minutes. Will the bottle be empty in an ho
Aleksandr-060686 [28]

Answer:

No

Step-by-step explanation:

2 liters = 2,000

80/3 = 26.6

the bottle leaks 26.6 milliliters in a min

26.6*60 = 1596

1596 / 1000 = 1.596 (to convert to liters)

the bottle will leak 1.596 an hour

hope this helps!

5 0
3 years ago
A scientist determines that the number of bacteria in a culture is modeled by the formula A(t)=4,000e0.02t, where t is the numbe
SpyIntel [72]

Using the exponential model given, the number of bacteria in the culture after 9 minutes after the observation began will be 4789

<u>Given the exponential model</u> :

  • A(t) = 4000e^{0.02t}
  • A(t) = Number\:bacteria\:in\:the\:culture\:after\:t\:minutes
  • <em>t = number of minutes after observation begins </em>

<u>The number of bacteria in the culture 9 minutes after the observation began can be calculated thus :</u>

t = 9 \: minutes

<em>Substitute 9 for t in the exponential equation :</em>

A(t) = 4000e^{0.02\times9}

A(t) = 4000e^{0.18}

A(t) = 4000 \times 1.1972173

A(t) = 4788.87

Therefore, the number of bacteria in the culture after 9 minutes will be about 4789

Learn more :brainly.com/question/10992447

8 0
2 years ago
I need the answer to this question
Marizza181 [45]

Answer:

a.

Step-by-step explanation:

we must say the p.m or a.m

5 0
3 years ago
In a recent Super Bowl, a TV network predicted that 53 % of the audience would express an interest in seeing one of its forthcom
rjkz [21]
<h3>Answer: -0.196</h3>

======================================================

Explanation:

We're conducting a one proportion Z test.

The hypothesized population proportion is p = 0.53, which is not to be confused with the p-value (unfortunately statistics textbooks seem to overuse the letter 'p'). Luckily this problem is not asking for the p-value.

The sample population proportion is

phat = x/n = 41/79 = 0.518987 approximately

The standard error (SE) is

SE = sqrt(p*(1-p)/n)

SE = sqrt(0.53*(1-0.53)/79)

SE = 0.056153 approximately

Making the test statistic to be

z = (phat - p)/(SE)

z = (0.518987 - 0.53)/0.056153

z = -0.19612487311452

z = -0.196

Which is approximate and rounded to 3 decimal places.

3 0
4 years ago
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