Solve the problem.The gravitational attraction A between two masses varies inversely with the square of the distance between them. If the force of attraction is 9 lb when the masses are 2 ft apart, what is the attraction when the masses are 6 ft apart?
A. 3 lb
B. 2 lb
C. 4 lb
D. 1 lb
Answer: D
Mathematics
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Find the exact value of the expression.cos 35° cos 25° - sin 35° sin 25°
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Use the formula 
to find the grade resistance of a 
car traveling on a 
uphill grade. Calculate R to the nearest ten pounds.
A. 210 lb B. 140 lb C. 190 lb D. 160 lb
Mathematics
Find 
, 
and 
.
?
and 
?
A. 
B. 
C. 
D. 
Mathematics
Find the inverse of the function.f(x) = 
A. f-1(x) = 
B. f-1(x) = 
C. f-1(x) = 
D. Not a one-to-one function
Mathematics