Arectangle has a perimeter of 51.6 feet and a height of 9.9 feet. what is the length of the base?

Rectangle:

P = 2(L + W)

51.6 = 2 (L + 9.9)

L + 9.9 = 51.6 / 2

L + 9.9 = 25.8

L = 15.9

Answer

The length of the base = 15.9 feet

So, the relationship with i hours as the indecent variables would be  

Serena can't paint 400 square feet of wall space of wall space in 3.5 hours.

Step-by-step explanation:

Since we have given that

Area that she can paint = 60 square feet

Time taken = half hour = 30 minutes = 0.5 hours

Using "Unitary method, we get that

In 0.5 hours, she can paint = 60 square feet

In 1 hour, she can paint =  

In i hours, she can paint =  

Let the total area she can paint be 'y'.

So, the relationship with i hours as the indecent variables would be

Now,  Can Serena paint 400 square feet of wall space i. 3.5 hours

We put y = 400 and i = 3.5 hours to check whether it is equal or not.

Hence, Serena can't paint 400 square feet of wall space of wall space in 3.5 hours.