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Exam
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
does not exist as a real number
does not exist as a real number
does not exist as a real number
does not exist as a real number
does not exist as a real number
Use a calculator to approximate to three decimal places.
For the given function, find the indicated function value.
For f(x) =4x – 14, find f(7).
For g(x) =x2– 20, find g(11).
For g(x) = – (x + 1)2, find g(-6).
For g(x) =(x – 1)2, find g(9).
For f(x) =4x – 14, find f(-9).
Does not exist as a real number
For g(x) =x2– 20, find g(2).
Does not exist as a real number
The cost of manufacturing clocks is given by c =25 n + 81, where c is the total cost and n is the number
produced. What is c when no clocks are produced?
A retailer finds that total costs per day are given by c =169 n+ 144, where c is cost and n is units sold. What is
c when no units are sold?
Police use a formula s = S l
L, where S is the test–car speed and L is the test–skid length, to find the actual
speed s in an accident which left a skid mark of l. Find the speed (nearest whole mph) when S =63 mph,
l = 150 ft, L = 100 ft.
Find the following. Assume that the letter can represent any real number.
For the given function, find the indicated function value.
For f(x) =
3x + 1, find f(-28).
Does not exist as a real number
For f(x) =
32x – 1, find f(-13).
Does not exist as a real number
For f(x) =32x + 3, find f(9).
Find the following. Assume that letters can represent any real number.
D
Rewrite without rational exponents, and simplify, if possible.
Rewrite with rational exponents.
Rewrite with positive exponents, and simplify, if possible.
Use the laws of exponents to simplify. Write the answer with positive exponents.
Use rational exponents to simplify. Write the answer in radical notation if appropriate.
Use rational exponents to write a single radical expression.