Question

1. The loudness level of a? sound, D, in? decibels, is given by the formula D=10log(10^12I), where I is the intensity of the? sound, in watts per

meter^2. Decibel levels range from? 0, a barely audible? sound, to? 160, a sound resulting in a ruptured eardrum. The sound of a certain animal can be heard 500 miles? away, reaching an intensity of 6.96.9t×(10^5) watts per meter^2. Determine the decibel level of this sound. At close? range, can the sound of this animal rupture the human? eardrum?

a) The decibel level of this? animal's sound is approximately _____ decibels. (Round to the nearest whole number as? needed.)

b) At close range, can the sound of this animal rupture the human eardrum?

2. Use the compound interest formulas A=P(1+(r/n))^(nt) and A=Pe^(rt) to solve the problem given. Round answers to the nearest cent.

Find the accumulated value of an investment of $15,000 for 4 years at an interest rate of 6% if the money is a. compounded? semiannually; b. compounded?quarterly; c. compounded monthly d. compounded continuously. (ROUND ALL ANSWER TO 3 DECIMAL PLACES)

Answer 1