3 years ago

A survey is given to every 4th grade student that walks into the school. What type of survey is this?

Mathematics

1 answer:

katrin [286]3 years ago

3 0

Pop quiz? I at least think

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Let r(t)=⟨t2,1−t,4t⟩. calculate the derivative of r(t)⋅a(t) at t=5, assuming that a(5)=⟨−4,4,−5⟩ and a′(5)=⟨−5,9,3⟩

erastovalidia [21]

$\mathbf r(t)=\langle t^2,1-t,4t\rangle$
$\implies\mathbf r'(t)=\langle 2t,-1,4\rangle$

$\dfrac{\mathrm d(\mathbf r(t)\cdot\mathbf a(t))}{\mathrm dt}\bigg|_{t=5}=\mathbf r'(5)\cdot\mathbf a(5)+\mathbf r(5)\cdot\mathbf a'(5)$
$=\langle10,-1,4\rangle\cdot\langle-4,4,-5\rangle+\langle25,-4,20\rangle\cdot\langle-5,9,3\rangle$
$=(-40-4-20)+(-125-36+60)$
$=-165$

6 0

3 years ago

Ok i have to identify the slope and the y intercept

LuckyWell [14K]

Answer:

m=2

b=-3

Step-by-step explanation:

standard form of the slope equation

y=mx+b

m=2

b=-3

8 0

3 years ago

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Can someone help me please with these questions

Ad libitum [116K]

What is the question? You only gave shapes with dimensions.
Do you want us to find volume? Or surface area??
Come on please, dont leave us hangin.

Com.ment me what your question is

7 0

2 years ago

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p is a polynomial of degree 5. p has roots of multiplicity 2 at t=4 and t=0, a root of multiplicity 1 at t=-4, and p(1)=2025. Fi

DENIUS [597]

P(x) = (x^2)(x - 4)^2(x + 4) + some constant(b)
2025 = (1^2)(1 - 4)^2(1 + 4) + b
2025 = 45 + b
b = 1980

Complete Equation:

p(x) = (x^2)(x - 4)^2(x +4) + 1980

or expanded form

p(x) = x^5 - 4x^4 - 16x^3 + 64x^2 + 1980

5 0

2 years ago

If m is 7 and x is 7 so what is m

olchik [2.2K]

Can u just post the whole question or elaborate further

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2 years ago

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