Joey's first 14 quiz grades in a marking period were as follows: 86 84 91 75 78 80 74
87 76 96 82 90 98 93
Suppose Joey has an unexcused absence for the 15th quiz, and he receives a score of 0.
What is the range of Joey's first 14 quiz grades? What is the range of Joey's quiz grades after his unexcused absence?

1.  

2.  

Step-by-step explanation:

Given

The data of quizzes

Required

Solving (a): Range of the 14 quizzes

In this case;

So;

Solving for (b): Range of 15 quizzes

In this case;

Least = 0

So; Range becomes

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.