Mike

The 11 rock units have been labeled with

random letters from A to K. Based on the rules of relative age determination, rearrange the letters and mark

their locations on the geologic column to the right, to match the sequence of formation of each of the 11

different units. Also include in the geologic column the locations of the two unconformities.

11: Last unit, youngest

10:

9:

8:

7:

6:

5:

4:

3:

2:

1: First unit, oldest

http://i62.tinypic.com/2qbd3lf.png

Suppose that a simple linear regression model is appropriate for describing the relationship between y = house price and x = house size (sq ft) for houses in a large city. The true regression line is y = 22,000 + 42x and σ = 5000.

What proportion of 1900 sq ft homes would be priced over $110,000? (Round your answer to four decimal places.)

------------

Under $100,000? (Round your answer to four decimal places.)

-------------

d^2(x)/dt + x^4 + 1 = 0 as a first order system.

Let v1 and v2 be linearly independent. Prove that u1 = v1 + v2, u2 = v1 − v2 are linearly independent.

Determine which of the following matrix expressions exist, and give the sizes of the resulting matrix when they do exist.

a) ABC

b) ABD

c) CAB

d) DCAB

e) A^2 BDC

Let B be a matrix whose third column is all zeros. Let A be a matrix such that the product exists AB exists. Prove that the third column of AB is all zeros.

http://i.imgur.com/15ImFQc.png

f(x) = -3x^2 0≤x and x<3

-2 3≤x

a) b

b) 0

c) b^2

d) b^3

http://i.imgur.com/quxJMu0.png

how many solutions are possible for the system of equations

[2x-y=2, -6y+3y=4]

a) one solution

b) no solution

C) infinitely many solutions

d) two sol

I think its 2 solutions

y'' + 2y' −8y = 0; y(0) = 4, y'(0) = −2

Use the fact that ∫e^(ax) sin bx dx = e^(ax) / (a^(2) + b^(2)) [a sin bx−b cos bx] to find L[e^(rx) sin βx] by the definition.

http://i.imgur.com/vQpCCJG.png

In the spring-mass system my ''+d y '+ ky = k sin (µ t), the parameter µ is the

angular input frequency.

a. True

b. False

In the spring-mass system my ''+d y '+ ky = k sin (µ t), any particular solution is

referred to as a gain for the system.

a. True

b. False

The undamped forced system my ''+ ky = k sin (µ t ) can result in wild

oscillations when µ^2 is much larger than k/ m.

a. True

b. False

The undamped forced system my ''+ ky = k sin (µ t ) can result in wild

oscillations when µ^2 is much smaller than k /m.

a. True

b. False

In the spring-mass system my ''+d y '+ ky = k sin (µ t), the parameter µ is the

angular input frequency.

a. True

b. False

In the spring-mass system my ''+d y '+ ky = k sin (µ t), any particular solution is

referred to as a gain for the system.

a. True

b. False

The undamped forced system my ''+ ky = k sin (µ t ) can result in wild

oscillations when µ^2 is much larger than k/ m.

a. True

b. False

The undamped forced system my ''+ ky = k sin (µ t ) can result in wild

oscillations when µ^2 is much smaller than k /m.

a. True

b. False