, 21.05.2021 01:00 Blbyrd1287

Which of the following terms should not be used to describe a polygon? A. convex B. arc C. regular D. concave

Another question on Mathematics

Mathematics, 22.06.2019 00:00
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?
Mathematics, 22.06.2019 00:30
The high temp today was 62Â°. when nighttime comes, the temp will drop 40Â°. by 4am the temp will drop an additional 40Â°. what is the temp at 4am?