Can someone please help? Work needs to be shown and needs to be formatted using the shown formulas Calculate the area and perimeter of the polygon using the coordinates using the following formulas
Perimeter (Triangle): P = a+b+c
Area (Triangle): A = bh
.

Also using Midpoint formula & Distance formula (shown in picture)

What fraction of one year is 8 months

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?

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?