Find the sum without the use of a number line.(-5) + (-6)
A. 1
B. -1
C. 11
D. -11
Answer: D
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Solve the problem.The sales of typewriters have declined considerably in recent years because of the advent of computers. Assume that there were 24 million typewriters sold in 1980 and 3 million sold in 1990. In addition, assume the sales are decreasing according to the exponential decay model. Find the value k, and write an exponential function that describes the number of typewriters sold after time t, in years. (Round decimals to three places.)
A. k = 0.318; S(t) = 24e-0.318t, where S(t) is in millions and t is the number of years since 1980. B. k = 0.11; S(t) = 24e-0.11t, where S(t) is in millions and t is the number of years since 1980. C. k = -0.208; S(t) = 24e-0.208t, where S(t) is in millions and t is the number of years since 1980. D. k = 0.208; S(t) = 24e-0.208t, where S(t) is in millions and t is the number of years since 1980.
Solve the problem. Assume projectile is ideal, launch angle is measured from the horizontal, and launch is over a horizontal surface, unless stated otherwise.A sprung gun at ground level fires a tennis ball at an angle of 46°. The ball lands 16 m away. What was the ball's initial speed? Round answer to the nearest tenth.
A. 156.9 m/sec B. 4.0 m/sec C. 14.8 m/sec D. 12.5 m/sec
Solve the equation by finding an expression for the determinant on the left, and then solving using the appropriate method.
= -2
A. ? B. {-2} C. {-1} D. {2}
Find the quotient. Write the answer in standard form.
A. -13 B. 13 C. -13i D. 13i