How do i express 3.87×10.3in standardform​

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

Acolony contains 1500 bacteria. the population increases at a rate of 115% each hour. if x represents the number of hours elapsed, which function represents the scenario? f(x) = 1500(1.15)" f(x) = 1500(115) f(x) = 1500(2.15) f(x) = 1500(215)