In chemistry lab the students started with 150 g of a substance. They were to heat the substance and reweigh it after 5, 10 ,15, and 20 minutes had passed and record the weights. The students recorded the following data: minutes passed grams left 5 149.65 10 123.93 15 100.22 20 89.96

The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?

Martin likes to make flower bouquets that have 3 daffodils and 4 tulips per vase. a daffodil has a mass of d grams, a tulip has a mass of t grams, and the vase has a mass of u grams. the expression 5(3d + 4t + v) describes the mass of 5 bouquets. match each amount in the situation with the expression that represents it. situation expression number of bouquets mass of one bouquet mass of the tulips in one bouquet 4t mass of the daffodils in one bouquet 3d + 4t + v

What could explain what happened when the time was equal to 120 minutes