The amount of carbon dioxide (\text{CO}_2)(CO 2 )left parenthesis, start text, C, O, end text, start subscript, 2, end subscri
pt, right parenthesis in the atmosphere increases rapidly as we continue to rely on fossil fuels. The relationship between the elapsed time, ttt, in decades, since \text{CO}_2CO 2 start text, C, O, end text, start subscript, 2, end subscript levels were first measured, and the total amount of \text{CO}_2CO 2 start text, C, O, end text, start subscript, 2, end subscript in the atmosphere, A_{\text{decade}}(t)A decade (t)A, start subscript, start text, d, e, c, a, d, e, end text, end subscript, left parenthesis, t, right parenthesis, in parts per million, is modeled by the following function:
2 answers:
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Answer:
1. Area of rectangular rug is
2. Area of triangular room is
Step-by-step explanation:
This problem bothers on the mensuration of flat shapes, rectangle and triangle.
step one
let us start by solving for the area of the rectangular rug
given data
Area A = ?
Length l = 11 ft
Width w= 10 ft
we know that the area of a rectangle is expressed as
substituting our given data we have
step two
let us solve for the area of the triangular room
given data
Area A = ?
base b = 30 ft
height h= 22 ft
we know that the area of a triangle is expressed as
substituting our given data we have
Answer:
Modification has not reduced the number of accidents.
Step-by-step explanation:
A B C D E F G H
Before modification 5 7 6 4 8 9 8 10
After modification 3 7 7 0 4 6 8 2
Difference -2 0 1 -4 -4 -3 0 -8
Mean of differences
Standard deviation of differences =
Formula of paired t test :
Df = n-1 = 8-1 =7
t critical> t calculated
So, We failed to reject null hypothesis
Hence modification has not reduced the number of accidents.