Express the sum using summation notation.3 + 6 + 9 + ... + 21
A. 
B. 
C. 
D. 
Answer: B
You might also like to view...
Evaluate.(-2)2
A. 4 B. 2 C. -4 D. -8
Find an approximate value of x using a scientific calculator. If necessary, round to four decimal places.ln x = -4.7
A. 0 B. 0.0091 C. 50,118.7234 D. 109.9472
Provide an appropriate response.Given an interest rate of 4.6% compounded semiannually, find the present value of the following annuity: $2100 at the end of every six months for six years and $3000 at the end of every six months for four more years.
Fill in the blank(s) with the appropriate word(s).
x? = x(0.02 ? 0.0004x ? 0.0012y) , y? = y (0.04 ? 0.0024x ? 0.0008y)
Let x and y represent the populations (in thousands) of two species that share a habitat. For each system of equations, find and assess the stability of the equilibrium points. Remember that, for real populations, both x0 and y0 must be nonnegative for ( x0, y0) to be an equilibrium point.