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3 years ago

6

A little while ago, a dolphin was swimming below sea level at -7 meters.Now the dolphin is jumping at 0.5 meters. What does this

mean?

2 answers:

professor190 [17]3 years ago

5 0

Answer:

The Dolphin is 0.5 meters above sea level

Step-by-step explanation:

anzhelika [568]3 years ago

4 0

The dolphin jumped 7.5 meters because it took 7 meters to reach sea level and it jumped 0.5 meters above sea level so 7+.5=7.5 m

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laiz [17]

Answer:

$AB=12\sqrt{3}\ cm$

Step-by-step explanation:

If AB is tangent to the circle, then angle ABO is right angle and triangle AOB is special $30^{\circ}-60^{\circ}-90^{\circ}$ triangle. In this triangle, the leg that is opposite to the angle of 30° is half of the hypotenuse. Thus,

$AO=2BO=2\cdot 12=24\ cm.$

By the Pythagorean theorem,

$AB^2=AO^2-BO^2,\\ \\AB^2=24^2-12^2,\\ \\AB^2=576-144=432,\\ \\AB=12\sqrt{3}\ cm.$

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3 years ago

Two factories I and II produce phones for brand ABC. Factory I produces 60% of all ABC phones, and factory II produces 40%. 10%

denpristay [2]

Answer:

0.3721 or 37.21%

Step-by-step explanation:

P(I) = 0.60; P(II) = 0.40;

P(not defective I) = 0.90; P(not defective II) = 0.80

The probability that the phone came from factory II, given that is not defective, is determined by the probability of a phone from factory II not being defective divided by the probability of a phone not being defective.

$P(II|not) = \frac{P(II)*P(not_{II})}{P(II)*P(not_{II})+P(I)*P(not_{I})}\\P(II|not) = \frac{0.40*0.80}{0.40*0.80+0.60*0.90}\\ P(II|not) =0.3721 = 37.21\%$

The probability is 0.3721 or 37.21%.

4 0

3 years ago

A number is divided by 3. That quotient is increased by 12. The result is 46. Find the number.

anzhelika [568]

Let the number be x.

x/3 + 12 = 46

Subtract 12 from both sides and you will get:

x/3 = 34

Multiply both sides by 3:

x = 102

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Lady bird [3.3K]

Answer:

130

Step-by-step explanation:

I don' know my explanation.

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