The lest common multiple of a number n and 6 is 42. what are of the possible whole number values for n?

One possible value of n is 7

List out the multiples:

7: 7, 14, 21, 28, 35, 42, 49
6: 6, 12, 18, 24, 30, 36, 42, 48

Another possible value of n is 42

List out the multiples:

42: 42, 84
6: 6, 12, 18, 24, 30, 36, 42, 48

The ball will be 84 feet above the ground 1.125 seconds and 4.5 seconds after launch.

Step-by-step explanation:

Statement is incorrect. Correct form is presented below:

The height of an ball that is thrown straight upward from an initial position 3 feet off the ground with initial velocity of 90 feet per second is given by equation , where is time in seconds. After how many seconds will the ball be 84 feet above the ground.

We equalize the kinematic formula to 84 feet and solve the resulting second-order polynomial by Quadratic Formula to determine the instants associated with such height:

(1)

By Quadratic Formula:

,

The ball will be 84 feet above the ground 1.125 seconds and 4.5 seconds after launch.