A4-lb. force acting in the direction of (4, -2) moves an object over 7 ft. from point (0, 4) to (5, -1). find the work done to move the object to the nearest foot-pound. a. 35 ft. - lbs b. 27 ft.- lbs c. 18 ft. - lbs d. 7 ft. - lbs

The work done to move the object is 27 ft-lbs

B is correct.

Step-by-step explanation:

A 4-lb. force acting in the direction of (4, -2).

First we find the unit vector of direction of force.

4-lb force acting in direction of vector a

Object move 7 ft from point (0,4) to (5,-1)

Displacement vector whose length 7 ft

Now, we will find workdone by force

Hence, The work done to move the object is 27 ft-lbs

22

step-by-step explanation:

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify