Solve the problem.You find a 2-pound nugget that is 50% gold. What is its purity in karats?
A. 50 karats
B. 4.8 karats
C. 24 karats
D. 12 karats
Answer: D
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A matrix has an inverse if and only if its determinant does not equal 0. Determine whether the given matrix has an inverse.
A. Yes B. No
Solve the problem.The daily profit in dollars of a specialty cake shop is described by the function 
where x is the number of cakes prepared in one day. The maximum profit for the company occurs at the vertex of the parabola. How many cakes should be prepared per day in order to maximize profit?
A. 28 cakes B. 56 cakes C. 784 cakes D. 2352 cakes
Use a graphing utility to graph the function over the indicated interval and approximate any local maxima and local minima. Determine where the function is increasing and where it is decreasing. If necessary, round answers to two decimal places.f(x) = 0.15x4 + 0.3x3 - 0.8x2 + 5; (-4, 2)
What will be an ideal response?
First, use front-end rounding to round each number and estimate the answer. Then, find the exact answer.Pat bought a dress originally costing $95.63. When she brought the dress to the counter, the agent told her that it was discounted $9.56. What is the sales price for the dress?
A. Estimate: $90; exact: $76.07 B. Estimate: $10; exact: $9.56 C. Estimate: $90; exact: $86.07 D. Estimate: $90; exact: $85.63