3 of 12 The perimeter of a rectangular piece of cardboard is 7 feet, and the area is 3 square feet. The length and width of this piece are each multiplied by 6. What is the perimeter of the new enlarged piece of cardboard? A. 34 ft.
B. 42 ft.
C. 54 ft.
D. 68 ft.​

B. 42 ft.

Step-by-step explanation:

2L+2W=7

LW=3

L=3/W

2(3/W)+2W=7

6/W+2W=7

6+3W=7W

6=4W

W=3/2

L=2

12(2)+12(3/2)=42

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.

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step-by-step explanation:

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