If ?DEF is isosceles and ET bisects ?DEF, then
(a) ET ? DF.
(b) ET bisects DF.
(c) Neither (a) nor (b) is necessarily true.
(d) Both (a) and (b) are true.
(e) DET FET.
(c) Neither (a) nor (b) is necessarily true.
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Solve the problem.The position (in centimeters) of an object oscillating up and down at the end of a spring is given by 
at time t (in seconds). The value of A is the amplitude of the motion, k is a measure of the stiffness of the spring, and m is the mass of the object. Find the object's acceleration at time t.
A. a = - A
sin 
cm/sec2
B. a = 
cos 
cm/sec2
C. a = - 
sin 
cm/sec2
D. a = - A sin 
cm/sec2
Represent the radical as a radical with a smaller root index. Assume any variables represent nonnegative values.
A. 
B. 
C. 
D. 
Use algebraic and/or graphical methods to solve the inequality.7x5 < 70x3
A. -
< x < 
B. -10 < x < 0 or 0 < x < 10
C. x < -
or x > 
D. x < -
or 0 < x < 
Rewrite with positive exponents, and simplify, if possible.5-3/5ax-4/5z5
A. 
B. 
C. 
D. 