HELP ME (How many cubes with side length 1/2 cm does it take to fill the prism

If there is no real number solution to the quadratic equation x^2+2x+c=0 what is a possible value of c? 1 -2 0 3

Write the fraction or mixed number and the decimal shown by the model

Due to bad planning, two of the local schools have their annual plays on the same weekend. while 457 people attend one, and 372 attend the other, only 104 people were able to attend both. how many people went to at least one play?