Abasketball player throws the ball up to another player who dunks it at the hoop. the ball leaves the hands of the first player 6 feet above the ground at an upward velocity of 20 feet per second. the second player catches the ball right at the rim, which is 10 feet above the ground. how long does it take for the ball to get from the first players' hands to the second player.

The ball will take 1 sec

Step-by-step explanation:

∵ The distance from the ground when the ball leaves = 6 ft

∵ The distance from the ground when the ball catches = 10 ft

∴ The difference between two position = 10 - 6 = 4 ft

∵ s = ut - 1/2 at² ⇒ s is the distance , u is the initial velocity , a is acceleration of gravity and t is the time

∵ s = 4 feet , u = 20 feet/sec and a ≅ 32 feet/sec²

∴ 4 = 20t -32/2 t²

∴ 16t² - 20t + 4 = 0

∴ (4t - 4)(4t - 1) = 0

∴ 4t - 4 = 0 ⇒ t = 1  and 4t - 1 = 0 ⇒ t = 1/4

∴ The ball will take 1 sec to go from first player to the second player

Note: 1/4 sec is the time of the ball after leaves the position of the first player by 4 feet above the initial position.

the results from a pre-test for students for the year 2000 and the year 2010 are illustrated in the box plot. what do these results tell us about how students performed on the 29 question pre-test for the two years?

if we compare only the lowest and highest scores between the two years, we might conclude that the students in 2010 did better than the students in 2010. this conclusion seems to follow since the lowest score of 8 in 2010 is greater in value than the lowest score of 6 in 2000. also, the highest score of 28 in 2010 is greater in value than the highest score of 27 in 2000.

but the box portion of the illustration gives us more detailed information. the middle bar in each box shows us that the median score of 20 in 2000 is greater in value than the median score of 17 in 2010. further, we note that the box and whiskers divide the illustration into four pieces. each of these four pieces represents the same portion of students. so, the upper half of the students in 2000 scored in the same score range as the upper one-fourth of the students in 2010, see the illustration at a score of 20.

by considering the upper one-fourth, upper half, and upper three-fourths instead of just the lowest and highest scores, we would conclude that the students as a whole did much better in 2000 than in 2010. we would conclude that as a whole the students in 2010 are less prepared than the students in 2000.

in this section, we discuss box-and-whisker plots and the five key values used in constructing a box-and-whisker plot. the key values are called a five-number summary, which consists of the minimum, first quartile, median, third quartile, and maximum.

step-by-step explanation: