Find the sum of the angles of a polygon with 7 sides.
?

A.


B.


C.


D.


E.



Answer: D

Mathematics

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Solve the problem.Consider the region R bounded by the graph of f(x) =  on the interval [0, 3]. Find the volume of the solid formed when R is revolved about the y-axis.

A. ?
B. ?
C. 2?
D. 2?

Mathematics

Simplify the expression.e-ln x5

A. x5
B.
C.
D. 5

Mathematics

Suppose the distance s (in feet) covered by a car moving along a straight road after t sec is given by the function Calculate the (instantaneous) velocity of the car when t=35.

Select the correct answer. a. 223 ft/sec b. 16 ft/sec c. 560 ft/sec d. 4130 ft/sec

Mathematics

Solve the problem.The function f(t) = -0.12t2 + 0.53t + 30.4 models the U.S. population in millions, ages 65 and older, where t represents years after 1990. The function g(t) = 0.53t2 + 11.9t + 106.4 models the total yearly cost of Medicare in billions of dollars, where t represents years after 1990. What does the function  represent? Find (10).

A. Cost per person in thousands of dollars. $11.75 thousand B. Cost per person in thousands of dollars. $9.94 thousand C. Cost per person in thousands of dollars. $0.09 thousand D. Cost per person in thousands of dollars. $0.17 thousand

Mathematics