Solve the exponential equation. Use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution.e x + 3 = 6
A. -1.13
B. -1.21
C. 2.20
D. -0.80
Answer: B
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Convert the equation given in polar form into rectangular form.r = 9 cos ? + 4 sin ?
A. 9x + 4y = 0 B. x2 + y2 = 9x + 4y C. x2 + y2 = 4x + 9y D. x2 - y2 = 9x + 4y
State the value of the discriminant and the number of real solutions.4x2 - 4x + 1 = 0
A. -8, two B. 0, one C. 8, one D. 8, two
Solve the problem.Use the formula ? = 10 log(I/Io), where the loudness of a sound in decibels is determined by I, the number of Watts/m2 produced by the sound wave, and 
What is the intensity in Watts/m2 of a noise measured at 48 decibels? (Round to the nearest tenth.)
A. 6.3 × 10-7 W/m2 B. 1.2 × 1014 W/m2 C. 4.8 × 10-10 W/m2 D. 6.3 × 10-8 W/m2
For the given functions f and g, find the requested function or functional value.f(x) = 4x2 - 7; g(x) = x - 7Find (f - g)(3).
A. 39 B. -32 C. 19 D. 33