A dolphin jumped from 5 feet below the surface of the sea. Jane wrote −5 to represent the depth from which the dolphin jumped. What does 0 represent in this situation?the floor of the sea
the surface of the sea
the level to which the dolphin jumped
the level from which the dolphin jumped

Answers

Answer 1

Answer: The surface of the sea.

If -5 means that the dolphin was 5 feet below the surface, then represents the surface of the sea. And, for instance, if the dolphin jumped 5 feet above the surface of the sea, 5 would represent that.

Answer 2

Answer:

Answer:

Answer: surface of the sea

hope this helps :)

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Which function has real zeros at x = –8 and x = 5?g(x) = x2 + 3x – 40
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g(x) = x2 + 14x – 40
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Answers

Hello,

sum=-8+5=-3
prod=-8*5=-40

==>x²+3x-40

Answer A

Answer:The answer is A

i have this for my math review & i just don't seem to get it...what is (.9x+.8y)^2

Answers

Can you take the quantity [ x + y ] and square it ?

Can you take the quantity [ x + 2y ] and square it ?

Then you should have no trouble with the square of (.9x + .8y) .

The square of any binomial (expression with 2 terms) is

(square of the first term)
+ (square of the second term)
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The test to detect the presence of the hepatitis B virus is 97% accurate for a person who has the disease and 99% accurate for a person who does not have the disease. In a given population, 0.55% of the people are infected. The probability that a randomly chosen person gets an incorrect result is

Answers

0.0055*0.03+0.9945*0.01

because 0.55% people are infected and inaccuracy of the test is 3%
and rest 99.45% people are not infected and the inaccuracy of the test is 1%

0.03 and 0.01 are the probability of an error being made in infected and uninfected respectively.

0.01011 is the probability that a randomly chosen person gets an incorrect result.

Answer:

The required probability is 0.01011

Step-by-step explanation:

The test to detect the presence of hepatitis B is 97% accurate

Probability of presence and true = 0.97

Probability of presence and false = 0.03

The test to detect the absence of hepatitis B is 99% accurate

Probability of absence and true = 0.99

Probability of absence and false = 0.01

Probability of infected = 0.55% = 0.0055

Probability of not infected = 1 - 0.0055 = 0.9945

Probability to have an incorrect result : P(infected) and P(presence and false) + P(not infected) and P(absence and false)

= 0.0055 × 0.03 + 0.9945 × 0.01

= 0.01011

Hence, The required probability is 0.01011

How do you say 0.437 in decimals

Answers

Answer: 4 tenths, 3 hundredths, and 7 thousandths.

what do you mean

it's just 0.437

Fill in the other coordinate for the line 7x - 5y = 21: (4, )

Answers

7x - 5y = 21....(4,?)...so sub in 4 for x and solve for y
7(4) - 5y = 21
28 - 5y = 21
-5y = 21 - 28
-5y = - 7
y = 7/5

check..
7(4) - 5(7/5) = 21
28 - 35/5 = 21
28 - 7 = 21
21 = 21 (correct)

the other coordinate is 7/5......(4,7/5)

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