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3 years ago

12

Scientists researching amphibians put tags on 30 frogs in a wetland area. Later, the scientists captured 520 frogs, of which 12

had tags. To the nearest whole number, what is the best estimate for the frog population?

1 answer:

aleksklad [387]3 years ago

5 0

Answer:

I THINK THE ANSWER IS d or e

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The complement of set M is ______.

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3 years ago

Angela had $22.70 to spend on groceries. After buying 8 pineapples, she had $3.50 left. If each pineapple was the same price, wh

sesenic [268]

Answer:

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3 years ago

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2 years ago

Find the values of x and y?

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3 years ago

Read 2 more answers

The swimming team has competed in 45 races this season. They have won 30 races so far. How many races will the team need to win

tatuchka [14]

Answer:

15 races

Step-by-step explanation:

The team has competed in 45 and has won 30. So the success rate is:

Success rate is:

$Sccess\ rate=r= \frac{30}{45}*100\\ =66.7\ percent$

We have to find the number of races the team needs to win for 75% success rate

Which means that

$r = \frac{30+x}{45+x} = 0.75\\$

We have to solve the equation for x

$\frac{30+x}{45+x}=0.75\\ 30+x = 0.75(45+x)\\30+x=33.75+0.75x\\x-0.75x=33.75-30\\0.25x=3.75\\x=\frac{3.75}{0.25}\\ x=15$

The team needs to win 15 races to get 75% success rate ..

4 0

3 years ago