The total spent on research and development by the federal government in the United States during 2002–2012 can be approximated by S(t) = 3.1 ln t + 22 billion dollars (2 ≤ t ≤ 12), where t is the year since 2000.† What was the total spent in 2006 (t = 6)? (Round your answer to the nearest whole number.) $ billion

28 billion dollars

Step-by-step explanation:

The total spent on research and development by the federal government in the United States during 2002–2012 can be approximated by

 billion dollars (2 ≤ t ≤ 12), where t is the year since 2000.

If t=6, that is, In the year 2006,

=28 billion dollars (To the nearest billion dollars)

In 2006, the federal government of the United States spent approximately $28 billion on research and development.

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11 -1> 1 -1+ a

-12 > a

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.