Without graphing, determine whether the graph of the quadratic function opens up or opens down.f(x) = -3x2 - 4x + 5
A. opens up
B. opens down
Answer: B
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Provide an appropriate response. The compound amount when an investment is compounded continuously is expressed by the formula A = Peni, where A is the compound amount, P is the principal, n is the number of years, and i is the interest rate per year. Find the compound amount of an investment of $1,000 at an interest rate of 8% for 20 years if it is compounded continuously.
A. $4,660.96 B. $39,810.72 C. $4,953.03 D. $470.00
Solve by the substitution method. x + y = 89x + 9y = 72
A. {(7, 1)} B. {(0, 0)} C. {(x, y)| x + y = 8} D. ?
Solve the problem.When making a long distance call from a certain pay phone, the first three minutes of a call cost $2.95. After that, each additional minute or portion of a minute of that call costs $0.25. Use an inequality to find the number of minutes one can call long distance for $4.95.
A. 11 minutes or fewer B. 20 minutes or fewer C. 2 minutes or fewer D. 8 minutes or fewer
Multiply.0.29 × 0.01
A. 29 B. 290 C. 0.029 D. 0.0029