Use scientific notation to solve the problem.A light-year is the distance that light travels in one year. Find the number of miles in a light-year if light travels at a speed of 1.86 × 105 miles per second.
A. 6.0 × 107 mi
B. 6.0 × 1014 mi
C. 6.0 × 1012 mi
D. 6.0 × 105 mi
Answer: C
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Write an expression to state the problem and simplify.A stack of currency contains 50 bills. In the stack are x $20 bills. The rest are $50 bills. How much money is in the stack of bills?
A. 20x - 50(50 - x); 70x - 2500 dollars B. 20x + 50(50 - x); 30x + 2500 dollars C. 20x + 50(50 - x); -30x + 2500 dollars D. Cannot be solved
For 
, find the simplified difference quotient.
What will be an ideal response?
Use a graphing calculator to solve the system of equations. Round your solution to one decimal place.1.7x + 10.6y + 3.7z = 3.83.7x - 7.0y - 1.9z = -4.32.8x + 1.5y + 2.3z = 11.5
A. (-5.2, -9.1, 32.8) B. (-1.9, -3.3, 12.0) C. (-1.3, -2.2, 8.0) D. (3.2, 5.6, -20.0)
Use formulas to find the area of the figure.
A. 249 in.2 B. 415 in.2 C. 235 in.2 D. 147 in.2