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vovangra [49]
3 years ago
6

We have 7 Kittens born. 3 were black how many were not? write as fraction and division problem

Mathematics
1 answer:
garik1379 [7]3 years ago
7 0

Answer:

4/7 kittens are not black

4 ÷ 7

Step-by-step explanation:

7 kittens total

3 are black

7 - 3 = 4

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Swimming speed of salmon. The graph is showed below shows the influence of the temperature T on the maximum sustainable swimming
Doss [256]

Answer:

Here we have the relation between the speed of the salmon and the temperature.

a) the relation dS/dT tell us how the speed of the salmon changes as the temperature changes, and the units should be (if speed is m/s and temperature is in °C )

[dS/dT ] = [m/s*°C ].

b) I can not do a draw of the figure, but i can give a aproximation.

For T = 18°C, we can see that we are around the maximum of the curve, this means that around this point we will find the zero in the first derivate.

then S'(18) ≈ 0 m/s*°C

this means that around this point the changes are small.

for T = 10°C

Around this region, we can see almost a linear behavior.

so we can take a range of +-2°C

S(12°C) = 25m/s

S(8°C) = 20m/s

then the slope can be obtained using the relation:

S = (Y2 - Y1)/(X2 - X1) where this is the slope for the line that goes trough the pairs. (X1, Y1) and (X2, Y2)

S = (25 - 20)/(12 - 8) = 5/4

then we have that S´(10°C) ≈ 5/4 m/s*°C

Those two results are approximations, you may find better approximations by doing this with a ruler and drawing the tangents.

5 0
3 years ago
A factory produces car tires. The number of miles each tire lasts before it completely wares out follows a normal distribution w
qwelly [4]

Answer: 0.0668073

Step-by-step explanation:

Given : The number of miles each tire lasts before it completely wares out follows a normal distribution with mean μ = 50,000 miles and standard deviation σ = 8,000 miles.

Let x be the random variable that represents the number of miles each tire lasts.

z-score : \dfrac{x-\mu}{\sigma}

For x= 62,000

z=\dfrac{62000-50000}{8000}=1.5

By using the standard z-value table , the probability for a randomly selected tire to last for at least 62,000 miles will be :_

P(x\geq62000)=P(z\geq1.5)=1-P(z

Hence, the probability for a randomly selected tire to last for at least 62,000 miles = 0.0668073

4 0
3 years ago
Which choices are solutions to the following equation x^2-5x=-9/4
koban [17]

Answer:

the explanation is in the picture

please like and Mark as brainliest

6 0
3 years ago
Help, Help me, please
11Alexandr11 [23.1K]

8×5×12in^2+8×5×10in^2+12×10in^2=480 in^2+400in^2+120in^2=1000in^2 if one takes all the angles

If not then the answer would be 420in^2+120in^2=540in^2

3 0
3 years ago
Multiply.<br><br> 7×2/5<br><br> Enter your answer as a mixed number in simplest form
Firdavs [7]

Answer: 2/5

Step-by-step explanation: if this is right can i pls get brainliest answer

5 0
2 years ago
Read 2 more answers
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