If ? and , find middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_95886e830c6640aab55dbcde6" />.

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A.
B.
C. -10
D.
E. does not exist

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Answer: D

Mathematics

A vertical  6-foot pole casts a shadow that is 10 feet long. How tall is a vertical pole that casts a shadow that is 12 feet long at the same time? ?

A. 20.00 feet B. 20.84 feet C. 7.20 feet D. 7.38 feet

Use implicit differentiation to find dy/dx.x = sec(10y)

A.  sec(10y) tan(10y)
B. cos(10y) cot(10y)
C.  cos(10y) cot(10y)
D. 10 sec(10y) tan(10y)

Find the slope and the y-intercept of the given line.5x + 7y = 48

A. -1; 
B. ; 
C. - ; 
D. 1; 

Solve the problem.A formula for the focal length of a lens is f = . Calculate f (the focal length) for a = 14 cm and  Round to the nearest tenth.

A. 6.7 cm B. 6.5 cm C. 7.3 cm D. 7.0 cm