The quotient of a number t and 4.2 is at most 15.

Step-by-step explanation:

Quotient of two numbers also means the result of the two numbers after division.

If the quotient of a number t and 4.2 is at most 15., this can be expressed using the inequality;

(note that at most 15 means that the highest value we can have is 15 after taking the quotient of the number hence the reason of the inequality sign.)

On solving the inequality for the variable t

Hence t is at most 63

the perimeter is increased by a factor of 2

the 3rd on is correct

step-by-step explanation: