F(1) equals 160 and f(n+1)=-2 F(n), what is f(4)

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Calculate the density of benzene if 300ml of it weighs 263g. a. 0.88 g/ml b. 1.14 g/ml c. 78,900 g/ml d. 37 g/ml

Which of the following would be a reasonable estimate for the weight of a pencil? a. 1 × 10^-20 lb b. 1 × 10^20 lb c. 1 × 10^2 lb d. 1 × 10^-2 lb