Solve the problem using the quadratic formula.The cumulative number (in thousands) of deaths from a certain disease from 2000 to 2010 may be modeled by
where x = 0 corresponds to 2000, x = 1 to 2001, etc. Use the formula for f(x) to estimate symbolically the year when the total number of deaths reached 120 thousand.
A. 2008
B. 2009
C. 2006
D. 2007
Answer: C
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Find (t) for the function given.
r(t) = 4i + sintj + costk
Simplify the rational expression. If the rational expression cannot be simplified, so state.
A. -
B. -
C. -
D.
Solve the problem. Round to the nearest hundredth of a percent if needed.A traffic engineer is counting the number of vehicles by type that turn into a residential area. The table below shows the results of the counts during a four-hour period. What is the probability that the next vehicle passing is an SUV?
A. 34.76% B. 33.72% C. 19.36% D. 33.13%
Solve the problem.Of the coffee makers sold in an appliance store, 4% have either a faulty switch or a defective cord, 1.2% have a faulty switch, and 0.3% have both defects. What is the probability that a coffee maker will have a defective cord given that it has either a faulty switch or defective cord? Round to the nearest thousandth.
A. 0.300 B. 0.012 C. 0.775 D. 0.003