PLZZZ HELP I WILL DEFINITELY MARK U How much work does it take to carry a 30 kg holiday tree up a 15 m flight of stairs? If this takes 3 minutes, how much power is exerted?

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

The extremely high temperatures needed to trigger nuclear fusion are proposed to be generated by laser irradiating a spherical pellet of deuterium and tritium fuel of diameter 1.8 mm. (a) determine the maximum fuel temperature that can be achieved by irradiating the pellet with 200 lasers, each producing a power of 550 w. the pellet has an absorptivity 0.3 and emissivity 0.8.

In positive numbers less than 1, the zeros between the decimal point and non zero are significant