Soft drinks are sold in 2-liter bottles or 354-milliliter containers. how many liters are in 354 milliliters?

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

Can someone explain to me how to do

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?