Assume that 0 < ? < ?/2. Find an expression for the indicated trigonometric function.Let x = 2 sin ? in 
. Find cos ?.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Find the equation of variation if the following is true.Suppose m varies directly as p and m = 20 when p = 4.
A. m = 16p
B. m = 
p
C. m = 24p
D. m = 5p
Mathematics
Solve the problem.If $4000 is invested in an account that pays interest compounded continuously, how long will it take to grow to $12,000 at 6%? Round to the nearest tenth.
A. 11.0 years B. 6.6 years C. 18.3 years D. 18.4 years
Mathematics
Find A-1 without a calculator.A = 
A. A-1 = 
B. A-1 = 
C. A-1 =
Mathematics
Solve the system of equations by the substitution method. Check your solutions. For any dependent equations, write your answer in ordered pair form.
A. {(-6, -8)} B. {(6, 8)} C. {(6, -8)} D. {(-6, 8)}
Mathematics