Solve the problem.Roberto invested some money at 5%, and then invested $4000 more than twice this amount at 4%. His total annual income from the two investments was $1460. How much was invested at 4%?
A. $20,000
B. $2400
C. $24,000
D. $12,000
Answer: C
Mathematics
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Find the maximum and minimum values of the objective function.F = 4y - 6x, subject toy ? 2x - 6y ? -2x + 14x ? 8
A. Maximum: -8; minimum: -56 B. Maximum: -14; minimum: -56 C. Maximum: -4; minimum: -28 D. Maximum: 14; minimum: -14
Mathematics
Simplify.(3x2)3(2x)-1
A. 6x5
B. 
C. 
D. 6x4
Mathematics
Differentiate.
Mathematics
Solve the problem.In 2015, the enrollment at a college is 20,700 students. Each year the enrollment decreases by 300 students. Let f(t) represent the enrollment at t years since 2015.i) Find an equation for f.ii) Use f to predict when the enrollment will be 18,000 students.iii) What is the slope of f? What does it mean in terms of enrollment?
What will be an ideal response?
Mathematics