Answer:
Step-by-step explanation:
Given
Shopper pushes a cart 50 m south down then turns 90 ^{\circ} west and moves 23 m.
he then makes 
turn and moves 14 m
(a)Largest possible displacement is when he turns towards south
Net displacement
(b)Smallest displacement when he turns towards north
Answer:
31.4
Step-by-step explanation:
Because you multiply the circumference by pi
It is equivalent to 17.7165 inches.
Answer: 105 grams
Step-by-step equation: they each eat 21 grams a day
You can solve this one by adding their rates, but you have to invert the numbers they give you to find the rate. Rate is measured in something per unit of time, and "per" indicates division. So the rates are: 1/3 of an hour (Sally) and 1/6 of an hour (Steve). So add the rates: 1/3 + 1/6 = 1/2. (1/3 is 2/6, and 2/6 + 1/6 = 3/6). Since their combined rate is 1/2 of a room in one hour, it takes them two hours to paint the room.
This answer makes sense: It takes Sally three hours by herself; with Steve's help, she's faster, but not THAT much faster, because he's pretty slow. You can often spot-check word problem answers like this by giving it a common sense once-over. If we came up with four hours, that would clearly be wrong: it should take her LONGER if she's getting help.
