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3 years ago

12

A zoo has 5 Emperor penguins. The Emperor penguins make up 30%, percent of all the penguins at the zoo. How many penguins live a

t the zoo

1 answer:

Maurinko [17]3 years ago

7 0

Answer:

50

Step-by-step explanation:

this can be solved by ratio 15/x = 30/100. Cross multiply and solve for x. The answer is 50.

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What is the ratio of red to blue cars there were 32 red cars and 16 blue cars

Rufina [12.5K]

Answer:

2:1

32:16 is 2:1

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3 years ago

Suppose human weights are normally distributed with mean 175 and standard deviation 36 pounds. A helicopter is evacuating people

Anuta_ua [19.1K]

Answer:

0.9812

Step-by-step explanation:

Given that human weights are normally distributed with mean 175 and standard deviation 36 pounds

For a sample of 9 people std error of sample would be

$\frac{36}{\sqrt{9} } =12$

Thus we find that sample mean is N(175, 12)

The plane will lift safely if sample average <200 pounds

i.e. Probability that it can safely lift off (i.e., the average weight of a person in the helicopter is less than 200)

= $P(\bar x$

~0.981

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3 years ago

Amy,Ruben,and Sam have a total of $71 in their wallet. Sam has 3 times what Reuben has. Reuben has $9 more than Amy. How much do

iogann1982 [59]

Total = amount Amy has(A) + amount Ruben has(R) + amount Sam has(S)
S = 3 * R
R = A + 9

S = 3 * (A+9)
S = 3A + 27

71 = A + (A + 9) + (3A + 27)
71 = 5A + 36
5A = 35
A = $7

R = A + 9
R = 7 + 9
R = $16

S = 3 * R
S = 3 * 16
S = $48

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3 years ago

What is0.4¯ expressed as a fraction in simplest form?

velikii [3]

Answer:

4 as a fraction is 2/5. Here you can submit another decimal number for us to convert to a fraction. Check out the next decimal number on our list that we converted to a fraction.

Step-by-step explanation:

pls mark me brainless to feed my frogs

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3 years ago

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Every day, the Randolph Pet Store uses 2 1/2 bags of dog food to feed the dogs. For how many days will 7 1/2 bags of dog food la

Alex73 [517]

I think the food will last for 5 days. Because if you subtract 7 1/2 bags with 2 1/2 you get 5.

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4 years ago

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