Use the decibel scale to answer the question.How does the intensity of sound form a concert speaker at a distance of 1 meter compare to the intensity at a distance of 7 meters?
A. Factor of 49 weaker at 7 m.
B. Factor of 107 weaker at 7 m.
C. Factor of 21 weaker at 7 m.
D. Factor of 7 weaker at 7 m.
Answer: A
You might also like to view...
Find the product.(9y + x)(9y - x)
A. 81y2 - 18xy - x2 B. 81y2 - x2 C. 81y2 + 18xy - x2 D. 18y2 - x2
Find the coordinates of the vertex and the intercepts of the quadratic function. When necessary, approximate the x-intercepts to the nearest tenth.g(x) = 2x2 + 20x + 46
A. V(5, -4); I(0, -46); (-7, 0); (-3, 0) B. V(20, 46); I(0, -46); (-10, 0); (10, 0) C. V(-10,-4); I(0, 46); (3.6, 0); (6.4, 0) D. V(-5, -4); I(0, 46); (-6.4, 0); (-3.6, 0)
Write the decimal in words.5.4
A. Five and four tenths B. Five and four millionths C. Five and four thousandths D. Five and four hundredths
Write an algebraic expression for each quantity using the given variable.Angle A of the triangle is 48° less than angle B. Use the letter b.
A. b = number of degrees in angle B; b - 48 = number of degrees in angle A B. b = number of degrees in angle B; b + 48 = number of degrees in angle A C. b = number of degrees in angle A; b - 48 = number of degrees in angle B D. b = number of degrees in angle B; 48 - b = number of degrees in angle A