Write the number in scientific notation.A light-year is a measure of length defined as the distance that light travels in one year, which is about 5,900,000,000,000 miles. Write this number in scientific notation.
A. 5.9 × 1012
B. 5.9 × 10-12
C. 0.59 × 10-11
D. 59 × 1011
Answer: A
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Answer the question.Suppose that a test for a disease correctly gives positive results for 95% of those having the disease and correctly gives negative results for 92% of those who don't have the disease. Suppose also that the incidence of the disease is 1%. If a person tests positive for the disease, what can you say about their chance of having the disease?
A. It is about 50% B. It is quite low C. It is very high D. It is 95%
Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. An insurance company is willing to insure the concert for $150,000 against rain for a premium of $30,000. If he buys this policy, what are his expected earnings from the concert?
A. $180,000 B. $300,000 C. $270,000 D. $239,400
Find the indicated value.Let f(x) = 2x. Find x when f(x) = 2.
A. 3 B. 2 C. 1 D. 0
The equation of a parabola is given. Determine if the parabola is horizontal or vertical, the way the parabola opens, and the vertex.x = 2(y - 10)2 - 3
A. vertical; opens upward; (10, -3) B. horizontal; opens to right; (-3, 10) C. vertical; opens upward; (-10, -3) D. horizontal; opens to right; (-3, -10)