Melanie recorded observations on the effect of two new fertilizers on the growth of plants. three identical plants having a height of 15 cm were used for the experiment. no fertilizer was added to the first plant, 100 g of fertilizer a was added to the second plant, and 100 g of fertilizer b was added to the third plant. all other growing conditions of the plants were kept constant. which step of the scientific method did melanie do here? a. drawing a conclusion b. testing with an experiment c. doing background research d. analyzing experimental data

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.