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vampirchik [111]
3 years ago
13

A zoo has 3 mammals for every 5 reptiles. If the zoo has 72 mammals, how many reptiles does it have? [Type your answer as a numb

er.]
Mathematics
2 answers:
Lyrx [107]3 years ago
7 0

Answer:120

Step-by-step explanation:


arlik [135]3 years ago
3 0
R/72=5/3  multiply both sides by 72

r=360/3

r=120
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Find the first term of the sequence 4, 12, 36, 108.... which exceeds 20,000.
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Answer:

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Step-by-step explanation:

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5 0
3 years ago
If there are approximately 1.8 million cars in Vancouver and if each car travels an average of 17,500 kilometres in a year, how
Goryan [66]

Rates are used to measure a quantity over another.

<em>The 1.8 million cars use </em>1.85 \times 10^{10}<em> liters each year</em>

Given

Cars = 1.8\ million

d = 17500km --- distance

r = 40miles/gallon

First, we calculate the number (n) of gallons used by each car

r = \frac{d}{n}

Solve for n

n = \frac{d}{r}

So, we have:

n = \frac{17500km}{40miles/gallon}

n = \frac{17500km}{40miles}gallon

Convert miles to kilometers

n = \frac{17500km}{40km \times 1.60934}gallon

n = \frac{17500km}{64.3738km}gallon

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The number of gallons (N), used by all the cars is:

N = n \times cars

N = 271.85 \times 1.8\ million

N = 489330000

Convert to liters

N = 489330000 \times 3.78541L

N = 1852314675.3L

In scientific notation to 2 decimal places, we have:

N = 1.85 \times 10^{10}L

<em>Hence, the number of liters used is </em>1.85 \times 10^{10}<em />

Read more about distance and rates at:

brainly.com/question/24659604

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3 years ago
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Step-by-step explanation:

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A taxi service charges $4.50 to pick someone up and then $0.75 per mile during the ride.
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