Solve.The gravitational attraction A between two masses varies inversely as the square of the distance between them. The force of attraction is 2.25 lb when the masses are 4 ft apart, what is the attraction when the masses are 6 ft apart?
A. 4 lb
B. 1 lb
C. 2 lb
D. 3 lb
Answer: B
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Solve.A rectangular box with volume 243 cubic feet is built with a square base and top. The cost is $1.50 per square foot for the top and the bottom and $2.00 per square foot for the sides. Let x represent the length of a side of the base. Express the cost the box as a function of x. Give the function and state its domain.
A. C = 4x + 
: x > 0
B. C = 3x2 + 
: x > 0
C. C = 3x2 + 
: x > 4
D. C = 2x2 + 
: x < 10
Find the absolute extreme values of each function on the interval.f(x) = csc x, - 
? x ? 
A. Maximum value of 0 at x = -?; minimum value of -1 at x = ? B. Maximum value: does not exist; minimum value: does not exist C. Maximum value of 1 at x = ?; minimum value of -1 at x = ? D. Maximum value of -1 at x = ?; minimum value of 1 at x = 0
Draw the angle having the given radian measure.-300° 
A. 
B. 
Solve for the missing value. Round to four decimal places.n = 30; i = 0.03; PMT = $100; PV = ?
A. $2000.0441 B. $4706.6287 C. $1918.1585 D. $1960.0441