The amount of time a certain brand of light bulb lasts is normally distribued with a nean of 1900 hours and a standard deviation of 45 hours. Out of 670 freshly installed
ight bulbs in a new large building, how many would be expected to last more than
1890 hours, to the nearest whole number?

You will get 25 points an image of a rectangular prism is shown below: part a: a cross section of the prism is cut with a plane parallel to the base. what is the name of the shape created by the cross section? explain your answer. (5 points) part b: if a cross section of the prism is cut perpendicular to the base, what would be the shape of the resulting cross section? explain your answer. (5 points)

What is the equation of the graph that represents f(x)=x^4 stretched vertically by 2 and shifted up 3 spaces

If you could answer these your a life saver