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lyudmila [28]
3 years ago
5

5. A study of a population of 1,200 frogs revealed that 12 out of every 180 frogs in the population

Mathematics
1 answer:
Delvig [45]3 years ago
8 0

Answer:

1,280

Step-by-step explanation:

prob(spots) = 12/180 = 1/15

so of the 1200 frogs, (1/15)(1200) should have spots, so ..

how many should not have frogs ?

or

prob(not spots) = 14/15

number who don't have spots = (14/15)(1200) = 1,280

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Answer:

650

Step-by-step explanation:

lets say the # of standard version is x and the # of high-quality version is y

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8 0
3 years ago
Sal wants to know if he has enough money to buy 4 gallons of gas. If he has $15, and each gallon of gas costs $3.29, which is a
velikii [3]

Answer:

Remember that when you are making stimates, you are going to roiund to the nearest dollar. Since $3.29 is closer to 3 dollars than four dollars, Sam should use the 3 dollars figure to estimate if he can afford 4 gallons of gas.

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The actual value is , so $3 per gallon is indeed a god estimate.

We can conclude that the correct answer is: $3 + $3 + $3 + $3 = 12, so Sal can afford the gas.

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Step-by-step explanation:

7 0
3 years ago
Exactly 120 tickets were sold for a concert. The tickets cost $12 each for adults, $10 each for seniors, and $6 each for childre
Gemiola [76]
A=adult tickets
c=chlderenticekts
s=sinior tickets

a=c

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sub
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add
18a+10s=1100

multiply first equation by -9 and add to other equation

-18a-9s=-1080
18a+10s=1100 +
0a+s=20

s=20
20 senior tickets were sold

answer is B
5 0
3 years ago
what is the exact area of a circle with a radius of 12 feet? A. 24π square feet B. 36π square feet C. 121π square feet D. 144π s
Maksim231197 [3]
The answer is D. 144pie square feet

5 0
3 years ago
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Three Less Than Is<br> Number 15
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Answer:12

Step-by-step explanation:

15-3=12

5 0
3 years ago
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