Math

posted by .

If i'm given the equation

4.23= -.19t^2+2.56t-2.37

how do i find the value of t?

  • Math -

    Put the equation into the form
    ax^2 + bx + c = 0
    then use the quadratic formula to find the solutions.

  • Math -

    Rewrite it in standard quadratic form as:
    0.19t^2 - 2.56 t +6.60 = 0

    The coefficients and constant are:
    a = 0.19
    b = -2.56
    c = 6.6

    Then use the quadratic formula for the two roots:

    t = [-b +/1 sqrt(b^2-4ac)]/2a

    One of the solutions is exactly 10.
    The other is 3.4737

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math,help

    I definately do not understand this problem. If y varies directly with x, and y = 600 when x = 1000, find the constant of variation K. If y is directonally (proportional) to x, then for every value of x there is a value for y multiplied …
  2. calculus

    First I would find the first derivative which is the slope and then would I plug in the given value into the original equation to find y and then use y-y_1=m(x-x_1)?
  3. calculus

    A quantity has the value P at time t seconds and is decreasing at a rate proportional to sqrt(P). a) By forming and solving a suitable differential equation, show that P= (a - bt)^2 , where a and b are constants. Given that when t= …
  4. calculus

    A quantity has the value P at time t seconds and is decreasing at a rate proportional to sqrt(P). a) By forming and solving a suitable differential equation, show that P= (a - bt)^2 , where a and b are constants. Given that when t= …
  5. Calculus

    1. a) For the Function and point below , Find f’(a). b) Determine the equation of the line tangent to the graph of f at (a,f(a)) for the given value of f(x) = 4x2+2x, a =1 F’(a) = y = 2. For the function find f’ using the definition …
  6. Calculus

    1. a) For the Function and point below , Find f’(a). b) Determine the equation of the line tangent to the graph of f at (a,f(a)) for the given value of f(x) = 4x2+2x, a =1 F’(a) = y = 2. For the function find f’ using the definition …
  7. Calc III

    Find the position vector of a particle that has the given acceleration and the specified initial velocity and position. a(t)= 56t i + sin(t) j + cos(2t) k v(0)= i r(0)= j I need help finding r(t) Thanks so much for your help!!
  8. math

    If y varies diretly with x, write an equation for the direct variation. then find each value. Find y when x = 10 if y = 8 when x = 20 If think I can find the value by y/10 = 8/20 with the answer for the value is 4. My problem is how …
  9. math

    A soccer ball is kicked upward from the ground and its height (in metres), t seconds after it is kicked, is given by the equation h(t)= -49t^2 + 19t. What wiil be the maximum height attained by the ball?
  10. Math

    The equation 2x^2+2y^2+x+4y+2c=0 represents a circle.(let's name it S1) 1)Find the values of a,b and and show that c<(17/16) 2)For positive integers of c,if the above circle is divided into two by, (x+p)^2=p^2 circle,find the value …

More Similar Questions