Newest questions posted by Marissa
  1. Trigonometry

    A scientist has 37 grams of a radioactive substance that decays exponentially. Assuming k=-0.3,how many grams of radioactive substance remain after 9 days.
  2. History

    The growing popularity of newspapers, magazines, and books in the United States during the 19th century contributed to which of these? The emergence of a uniquely American literary style The expansion of educational opportunities for women and minorities
  3. math

    The position of a bucket falling down a well can be represented by the function h(t)=-16t^{2} where t is time in seconds and h(t) is measured in feet. Based on this function, what is the velocity of the bucket after it has fallen for 4 seconds?
  4. Chemistry

    Write the symbol for the elements that fit the following descriptions 1. 10 electrons in each -3 ion 2. 18 electrons in each +2 ion 3. The alkaline earth metal in the third period
  5. Calculus

    A rectangular tank with a square​ base, an open​ top, and a volume of 4,000 ft cubed is to be constructed of sheet steel. Find the dimensions of the tank that has the minimum surface area. I'm not understanding how to get started and find the


Newest responses posted by Marissa
  1. english

  2. english

    Thanks guys you failed me
  3. Statistics

    Confidence interval for one proportion
  4. Science

    I see the answer but I am tring to fight out the practice
  5. Math

    It's 20