Determine whether the variation model is of the form  or  and find k. Then write a model that relates y and x.
x
9
18
27
36
45
y
2
4
6
8
10

A.
B.
C.
D.
E.

Answer: A

Mathematics

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Round the number in the left column to the place indicated in each of the other columns.  NumberHundredTenUnitTenthHundredthThousandth979.6686      

A. Number    Hundred  Ten   Unit Tenth  Hundredth Thousandth979.6686  1,000      980   980  979.7  979.68    979.669
  B. Number    Hundred  Ten   Unit Tenth  Hundredth Thousandth979.6686  1,000      980   981  979.7  979.76    979.760
  C. Number    Hundred  Ten   Unit Tenth  Hundredth Thousandth979.6686  1,000      980   980  979.7  979.67    979.669
  D. Number    Hundred  Ten   Unit Tenth  Hundredth Thousandth979.6686  1,000      970   980  979.7  979.76    979.669
  E. Number    Hundred  Ten   Unit Tenth  Hundredth Thousandth979.6686  900      970   980  979.8  979.67    979.669
 

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Find a symbolic representation for f-1(x).f(x) = 

A. f-1(x) = x2 - 4, x ? 0

B. f-1(x) = (x + 4)2
C. Not a one-to-one function
D. f-1(x) = 

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Use the properties of limits to find the indicated limit.(4 - 5x)

A. 4 B. 0 C. -1 D. does not exist

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Mathematics

Use the given trigonometric function value of ? to find the requested trigonometric function value of the acute angle ?. Rationalize the denominator where necessary.sin ? = Find tan ?.

A.
B.
C.
D.

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Mathematics