MST Trig Midterm Exam Review With Correct Actual Questions And Well Defined Answers.
6 views 0 purchase
Course
MST 225
Institution
MST 225
Given f(x) = 3x^2 - 4, find f(a-2) - correct answer 3a^2 - 12a + 8
*Plug in a-2 for x*
Find the zero of f(x) = -(2/3 x) - 8 - correct answer x = -12
*Solve for x*
Determine whether the graph of y = 5x^3 - 2x is symmet...
Find the zero of f(x) = -(2/3 x) - 8 - correct answer x = -12
*Solve for x*
Determine whether the graph of y = 5x^3 - 2x is symmetrical with respect to the x axis, y axis, or origin. -
correct answer Origin
*Graph*
Determine whether the function f(x) = x / (x^2 + 1) - correct answer Odd
**
Describe the end behavior of the graph of g(x) = 3x^3 -2x - correct answer As x
approaches -infinity, y approaches -infinity.
As x approaches infinity, y approaches infinity.
*Graph*
The height of a firework T seconds after it is launched is modeled by h(T) = -16T^2 + 115T + 8. Find its
average speed from 4 to 7 seconds. - correct answer -61 ft/sec
*h(4) = 212, h(7) = 29. Average the two numbers*
Given f(x) = -2[x-1.8], what is f(-12)? - correct answer 28.
*The [ ] simply rounds the numbers to the least specific digit*
Describe the transformations relating the graph of g(x) = (4x-1)^2 to the graph of its parent function f(x)
= x^2. - correct answer Right 1/4 and compressed.
, *Graph, or secondary number in parentheses over number in front of the x is equal to the shift, the 4
compresses the graph*
A cone with a height of 21 cm is shown on a computer screen. The animator increases the radius at a
rate of 4 cm per min. Write the function that gives the volume of the cone as a function of time. -
correct answer v = 112(pi)t^2
*r = 4t, v = 1/3 wr^2 x 21. Substitute the equations and simplify*
Find the inverse of f(x) = x^3 - 6. - correct answer y = cube root of (x+6)
*Switch x and y, then solve for y*
Horatio saves 5% of every paycheck plus $50. Write the function that can be used to find the amount of
his paycheck given the amount he saves. - correct answer A = .05x + 50
*x is the paycheck amount*
A rectangular swimming pool with length 50 ft and width 30 ft is surrounded by a sidewalk. Write a
function describing the area of the sidewalk. Then find the width if the area is 900 ft. - correct answer
a = 4x^2 + 160x
*The sidewalk is of x width, so two sides would be 50x, and two would be 30x (multiply to get 160x). The
corners are x by x feet, so four corners of x^2*
w = 5 ft
*Plug into equation*
Write a polynomial function of least degree with real coefficients that has zeros 4, -4, 1, -1, -1, 3i, and -
3i. - correct answer f(x) = x^6 - 8x^4 - 137x +144
*(x+4)(x-4)(x+1)(x-1)(x+3i)(x-3i), then solve/simplify*
How many negative real zeros could f(x) = 8x^4 - 2x^3 = 5x^2 +2x - 11 have? - correct answer
1
*Plug in -x for x, and count the sign changes*
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller RealGrades. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.49. You're not tied to anything after your purchase.
