Will give brainleist due at 9: 45 p. m. pls hurry super easy.
the table shows the amount it cost to rock climb at an indoor rock climbling facility, based on the number of hours. what is the rule to find the amount charged to the rock climb for x hours?
time: 1 2 3 4 x
amount: 13 21 29 37 ?

Awork system has five stations that have process times of 5, 9, 4, 9, and 8. what is the throughput time of the system?

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

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?