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Nonamiya [84]
4 years ago
13

How much work is done lifting a 10 pound calculus book from the ground to the top of a 30 foot building with a cable which weigh

s 2 pounds per foot?
Mathematics
1 answer:
OverLord2011 [107]4 years ago
8 0

Answer:

  1200 ft·lb

Step-by-step explanation:

On average, you're lifting the 60-lb cable a distance of 15 ft, so doing 900 ft·lb of work. Lifting the 10-lb calculus book 30 ft requires 300 ft·lb of work.

The total work is 900 ft·lb + 300 ft·lb = 1200 ft·lb.

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HELP ASAP!!!!!! Please
MissTica

1. Distributive property, because you are "distributing" the 5 across the parentheses.

2. Since we know that 5/10 is 0.5, this term must be close to that. 5/9 is about 0.55555, therefore, I'd go with 5/9 = 0.55

Hope I could help!

8 0
3 years ago
John inherited $5,000 from his grandfather. He put it in a savings account to buy a car when he turns 16. John is 13 right now.
elena-14-01-66 [18.8K]

Answer:

Step-by-step explanation:

$

1050

Explanation:

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P

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i

where P= Principle, r=rate as a decimal, t+ time in years.

(assuming simple interest)

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4 0
3 years ago
Read 2 more answers
You serve a volleyball with a mass of 2.1 kg the ball leaves your hand with the speed of 30 m/s the ball has kinetic energy calc
IgorC [24]

Answer:

945 J

Step-by-step explanation:

ball mass : m1=2.1kg

Speed of ball:  V=30m/s

K=?

--------------------------------------

Use equation for Kinetic energy:

K=m*V²/2

K=2.1kg*(30m/s)²/2

K=(2.1kg*900m²/s²)/2

K=945J

7 0
4 years ago
Jason is buying a home theater system on layaway for $349. If he makes a down payment of $25 and pays $54 each week will it take
Gekata [30.6K]
Hey! 
First, you would take 349 and subtract 25 from it.(349-25=324) This gets rid of the down payment. 
Next, you would divide 324 by 54. (324÷54=6)
It would take him 6 weeks! 
Hope this helped! And make sure to check my calculations! 
Godspeed
-Song
5 0
3 years ago
An article describes a study in which a new type of ointment was applied to forearms of volunteers to study the rates of absorpt
irinina [24]

Answer:

There were 28 different choices for the six locations to apply the new ointment

Step-by-step explanation:

The order in which the location are chosen is not important, which means that we use the combinations formula to solve this question.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

Two events, A and B are independent, if:

P(A \cap B) = P(A)P(B)

How many different choices were there for the six locations to apply the new ointment?

Six locations from a set of 8. So

C_{8,6} = \frac{8!}{6!2!} = 28

There were 28 different choices for the six locations to apply the new ointment

7 0
3 years ago
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