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a group of friends are at an amusement park and want to ride the new roller coaster. a sign says that all riders must be at least 120 centimeters tall. note: 1 meter = 100 centimeters.

this table shows each friend's height in meters.

friend
height
juan
1 meter 10 centimeters
erica
1 meter 25 centimeters
demarco
1 meter 7 centimeters
justine
1 meter 20 centimeters
select all the people who can ride the roller coaster.

answer choices

juan

erica

demarco

justine

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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?