I need Help with one and two ..?
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Mathematics, 22.06.2019 00:00, nshadow2920
Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?
Answers: 3
Mathematics, 22.06.2019 03:00, tylerbrewton23
The hockey team has been great! in 2008 they won 20% more games than in 2007. in 2009 they won 50% more games than in 2008. what was their overall percentage increase from 2007 through 2009?
Answers: 2
Mathematics, 22.06.2019 03:50, goldwinner300
Question 2 of 102 pointsthe temperature is 45°f. the temperature will decrease by 2°f each hour. leth be the number of hours. when will the temperature be below 32°f? write an inequality for this problem. oa. 45 + 2h 32b. 45 + 2h< 32o c. 45 - 2h< 32od. 45 - 2hs 32
Answers: 2
Mathematics, 27.07.2019 23:10
Computers and Technology, 27.07.2019 23:10