At the start of the month, Stephen’s savings account had a balance of $1,624. He made a $420 withdrawal each week for four weeks. During that month, he also made two deposits of $600 each and one deposit of $1,000. What was the balance in Stephen’s account at the end of the month?

$2,144

Step-by-step explanation:

1. Add up all the deposits and the savings account: 1,624+600+600+1,000=3,824

2. Multiply 420 by 4 because he spent $420 each week for 4 weeks: 420x4=1,680

3. Subtract 1,680 from 3,824 to find out how much money he has left. 3,824-1680=2,144.

So Stephen's balance is $2,144 at the end of the month.

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m