Solve the problem.Matt is going to invest no more than $4000 in two accounts earning 2% and 4% simple interest. He would like the accounts to earn at least $80 after one year. He wants to invest less than $1000 in the account earning 4% simple interest. Write a system of inequalities to describe this situation and solve by graphing.
A. 
B. 
C. 
D. 
Answer: B
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Sketch the given surface.x2 + y2 = 4
What will be an ideal response?
Sketch the indicated curve. Find the intercepts. Find any asymptotes. Find any relative extrema and determine the intervals on which the curve is increasing and the intervals on which it is decreasing. Find any inflection points. Determine the intervals on which the curve is concave up and the intervals on which it is concave down.y = 
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Construct a frequency polygon.
A. Frequency
| Height in inches |
B. Frequency
| Height in inches |
Solve the problem.A power boat in still water maintains a speed of 30 miles per hour. The boat heads directly across a river perpendicular to the current which has a speed of 8 miles per hour. Find the actual speed and direction of the boat.
A. 16 miles per hour; 30° off course B. 15 miles per hour; 32° off course C. 31 miles per hour; 15° off course D. 30 miles per hour; 15° off course