3 years ago

how many phone numbers are possible for the form ABC-XXXX? A is restricted to numbers 3-9 B,C and x can be any digit 1-9.

Mathematics

1 answer:

lakkis [162]3 years ago

7 0

I have no idea but i have a friend ill send over that is good at this stuff

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user100 [1]

The sum of this is -9

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If the acceleration of an object is given by dv/dt = −2v, Find the position function s(t) if v(0) = 7 and s(0) = 0.

kirill [66]

Answer:

Step-by-step explanation:

Given that acceleration of an object is

$\frac{dv}{dt} =-2v\\\frac{dv}{v} =-2dt\\ln v = -2t+C\\$

is the solution to the differential equation

Since v(0) =7

we get ln 7 = C

Hence $lnv = -2t+ln 7\\v=7e^{-2t}$

since velocity is rate of change of distance s we have

$v=\frac{ds}{dt} =7e^{-2t}\\s= [tex]s(t) =\frac{-7}{2} (e^{-2t})+C)[$

substitute t=0 and s=0

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So solution for distance is

$s(t) =\frac{-7}{2} (e^{-2t}-1)$

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4 years ago

The question is in the image! Please help if u can its due really soon

maw [93]

Answer:

5.4

Step-by-step explanation:

3x+38=10x

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38=7x

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3 years ago

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Which of the following equations can be used to solve for acceleration

Luden [163]

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The answer should be the second option B.

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↓↓↓↓↓↓↓

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12. State whether the number 97 is prime, composite, or neither.

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97 is a prime number.

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