The length of time patients stay at a local hospital has been tabulated, and the results are shown in the frequency distribution below. Find the mean length for a hospital stay. Please round your answer to the nearest tenth.
Length of Stay(days)Frequency1 - 2 50 2 - 3 32 3 - 4 18 4 - 5 10 5 - 6 8 6 - 7 5 7 - 8 26 8 - 9 17 9 - 10 22
A. mean length = 3.5 days
B. mean length = 3.2 days
C. mean length = 4.7 days
D. mean length = 6.8 days
E. mean length = 4.4 days
Answer: C
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Find the inverse of the function.f(x) = 
x + 2
A. f-1(x) = 
x + 9
B. f-1(x) = 9x - 18
C. f-1(x) = 
x - 2
D. f-1(x) = 9x + 18
Provide an appropriate response.The price charged for 2 different CDs at two different stores can be represented by the matrix 
The quantities of each CD sold at each store can be represented by the matrix 
Show that the transpose of the income generated (PQ)T is equal to the product of the transposes of P and Q in reverse order, QTPT.
What will be an ideal response?
Solve the problem.Brand X copier has improved its copier so that it produces 19% more copies than its old model. If the old model ran 681 copies per hour, how many copies would the new model run? Round your answer to the nearest whole number.
A. 376 copies per hour B. 696 copies per hour C. 810 copies per hour D. 795 copies per hour
Suppose that an automobile manufacturer has accepted orders for 30 minivans, 25 sport utility vehicles, and 15 sedans. These orders can be represented by the row vector Q = [ 30 25 15 ].The "raw materials" that go into each type of vehicle are steel, glass, plastic, paint, and labor. The entries in matrix R below give the number of units of each raw material (in this order) which are needed for each type of vehicle. R = 
. Suppose that steel costs $800 per unit, glass costs $400 per unit, plastic costs $300 per unit, paint costs $200 per unit, and labor costs $1000 per
unit. This data can be written as the column cost vector C = 
. The price the manufacturer negotiated for each minivan is $16,000, for each SUV is $21,000, and for each sedan is $13,000. This information can be written as the column price vector P = 
.Use the matrix operations on a graphing calculator to find the cost of each type of vehicle.
What will be an ideal response?