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  • Help, please?

    In your lab you mix equal volumes of a pH 1.0 solution and a pH 13.0solution. What will the final pH be?A. Near 12.0B. 13.0C. 7.0D. Between 13.0 and 14.0

    1 AnswerChemistry4 months ago
  • Answers, please?

    1. In Python, what is returned when evaluating [n for n in range(10) if n % 2]?

    2. In Python, what kind of error is returned by the following code? (e.g. NameError, ValueError, IOError, etc.) def my_func(n1, n2): return n1 + n2 my_func(1, 2, 3)

    3. What is returned by datetime(1970, 1, 1).strftime('%Y-%d-%B') in Python?

    1 AnswerProgramming & Design4 months ago
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    Explain, please?

    1 AnswerMathematics5 months ago
  • Explain, please?

    If the distance of a particle from the origin on a line is given by x(t)=3+(x-2)^4, then the number of times the particle reverses its direction is

    Answers: 0 or 1 or 2 or 3 

    1 AnswerMathematics5 months ago
  • Explain, please?

    1. Let g(x) is the reflection of f(x) about the line y=x, and f'(x)= x^12/1+x^2, if g(3)=a, then g'(3) =

    a) (1+a^2)/a

    b) a^12/(1+a^2)

    c) (1+a^2)/a^12

    d) a/(1+a^2)

    1 AnswerMathematics5 months ago
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    Explain, please?

    1 AnswerMathematics5 months ago
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    Explain, please?

    4 AnswersMathematics5 months ago
  • Explain, please?

    1. The coefficient of x^9 in the polynomial (x+1)(x+2)..(x+10)+(x+2)(x+3)..(x+11)+...+(x+11)(x+12)..(x+20) is

    a)1551

    b)1155

    c) 5115

    2. Let 1,ω,ω^2 be the cubic roots of unity, then the value of

    [(5-3ω/-3+5ω^2)-(3+5ω^2/3ω+5)]^6

    3. At some point (a, f(a)) on the graph of f(x) = -1 + 2x - x^2 the tangent to this graph goes through the origin. Which point is it?

    a) (0,-1)

    b) (1,0), (2,-1)

    c) (1,0), (-1,-4)

    d) (-1,-4), (2,-1)

    2 AnswersMathematics5 months ago
  • Explain, please?

    Let 1,ω,ω^2 be the cubic roots of unity, then the value of 

    [(5-3ω/-3+5ω^2)-(3+5ω^2/3ω+5)]^6

    1 AnswerMathematics5 months ago
  • Explain, please?

    If ω is imaginary cube root of unity, then (a+bω+cω^2)/(c+aω+bω^2)+(c+aω+bω^2)/(a+bω+cω^2)+(b+cω+aω^2)/(b+cω^4+aω^5) is equal to

    1. 1

    2. -1

    3. 0

    4. ω

    Mathematics5 months ago
  • Explain, please?

    1. If y+x = pi/2, what is the smallest value of tan(x) +cot(y)? 

    a) 0

    b) 1

    c) pi/2

    d) 2

    2. f(x) = ax^3 + bx^2 + cx +d. Where a, b, c, and d belongs to R, a does not equal 0 is increasing on R if

    a) a > 0

    b) ab > 0c) b^2-3ac < 0, a <0

    d) b^2-3ac < 0, a > 03. The second derivative of f(x)  is everywhere positive. f has a minimum value at x = a. The tangent line to f at x = b is given by the equation y = mx + c.  Which of the following statements is true?a) f(x) >= mx + c b) f(x) > mx + c c) f(x) <= mx + c d) f(x) < mx + c 

    4. At some point (a, f(a)) on the graph of f(x) = -1 + 2x - x^2 the tangent to this graph goes through the origin. Which point is it?a) (0,-1)

    b) (1,0), (2,-1)

    c) (1,0), (-1,-4)

    d) (-1,-4), (2,-1)

    2 AnswersMathematics5 months ago
  • Attachment image

    Explain, please?

    1 AnswerMathematics5 months ago
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    Please, explain?

    4 AnswersMathematics5 months ago