Multiply.3(-9)
A. -27
B. -127
C. -30
D. -270
Answer: A
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Solve the problem.A certain radioactive isotope decays at a rate of 1% per 500 years. If t represents time in years and y represents the amount of the isotope left, use the condition that 
to find the value of k in the equation 
A. -0.01005 B. 0.00538 C. 0.00002 D. -0.00002
Find the book value after the given number of years, using the straight-line method. Round your answer to the nearest dollar.Find the book value at the end of 6 years.Cost:$99,900Estimated life:50 yearsEstimated scrap value:$8991
A. $10,909 B. $88,991 C. $87,912 D. $98,082
Solve the problem.A box has dimensions 2" × 3" × 4". (See illustration.) 
Determine the angle ? formed by the diagonal of the 2" × 3" side and the diagonal of the 3" × 4" side. Round your answer to the nearest degree.
A. 60° B. 65° C. 62° D. 50°
Provide the proper response.In the ellipse 
+ 
= 1, what is the equation of the horizontal axis of symmetry? The vertical axis of symmetry?
A. Horizontal: y = 8; Vertical: x = -5 B. Horizontal: y = 5; Vertical: x = 8 C. Horizontal: y = -5; Vertical: x = 8 D. Horizontal: y = 5; Vertical: x = -8