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3 years ago

5

How have vaccines impacted health?

2 answers:

polet [3.4K]3 years ago

5 0

B. Or D. Would be your answer. The reason why I would say B. Is because people have different immune systems which makes your body reject the vaccine contents. But on the other hand for D. Is that it they have made a lot of pretty bad sicknesses almost disappear such as chicken pox.

fgiga [73]3 years ago

3 0

Answer:

D some disease have almost completely disappeared

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How do you learn math effectively?

Nataly [62]

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3 years ago

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On a road trip, a family drives 350 miles per day. How many, d, must they travel to reach a distance of at least 1,400 miles? Pa

yulyashka [42]

Answer:

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Step-by-step explanation:

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3 years ago

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Quadratic Functions in Standard Form

Stels [109]

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3 years ago

Simplify. (y3)5 · y4

igomit [66]

I'm assuming ya want us to simplify $(y^3)^5*y^4$

reemember some exponential rules

$(a^b)^c=a^{bc}$

$(a^b)(a^c)=a^{b+c}$

so

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4 0

3 years ago

A particle moves in the xy plane starting from time = 0 second and position (1m, 2m) with a velocity of v>=2i-4tj^

guapka [62]

Given :

A particle moves in the xy plane starting from time = 0 second and position (1m, 2m) with a velocity of v=2i-4tj .

To Find :

A. The vector position of the particle at any time t .

B. The acceleration of the particle at any time t .

Solution :

A )

Position of vector v is given by :

$d=\int\limits {v} \, dt\\\\d=\int\limits {(2i-4tj)} \, dt \\\\d=(2t)i+\dfrac{4t^2}{2}j\\\\d=(2t)i+(2t^2)j$

B )

Acceleration a is given by :

$a=\dfrac{dv}{dt}\\\\a=\dfrac{2i-4tj}{dt}\\\\a=\dfrac{2i}{dt}-\dfrac{4tj}{dt}\\\\a=0-4j\\\\a=-4j$

Hence , this is the required solution .

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3 years ago