Answer:

Step-by-step explanation:
The pressure exerted by an object is given by:

where
F is the magnitude of the force
A is the area of the surface perpendicular to the force
In this problem, the force is the weight of the books + the shelf, which is given by

where
m = 262 kg is the total mass
is the acceleration of gravity
Substituting,

The area of the four legs is:

Therefore, the pressure exerted on them is:

You would divide the distance by the amount of time it took for each friend. Whatever answer is lower, they walked faster. Please mark brainliest (:
Answer:
5 weeks
Step-by-step explanation:
$18 / week
goal is $90
18x = 90
90/18 = 5
18(5) =90
It will take him 5 weeks to save enough money to buy the skateboard
Answer:
Step-by-step explanation:
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