Answer:
$103.71
Step-by-step explanation:
Take the amount of the dog food cans and multiply it by 7:
7×$1.29=$9.03
Take the new number and multiply it by 4, since we need to figure out how much he spends in 4 weeks:
$9.03×4=$36.12
Now add the cost of the bagged dog food to the cost of the 7 cans throughout the 4 weeks:
$36.12+$67.59=$103.71
The student does a work of 500 Newton meter on the box.
Step-by-step explanation:
Given,
Weight of box of books = force = 200 N
Distance the box is lifted = 2.5 m
Work done = Force * distance
Work done = 
Work done = 500 Newton-meter
Newton meter is same as Joule.
Work done = 500 Joules
The student does a work of 500 Newton meter on the box.
Keywords: multiplication, work done
Learn more about multiplication at:
#LearnwithBrainly
Answer:
no
Step-by-step explanation:
u will have to explain