Find the product. Assume that all variables represent nonnegative real numbers.(
- 3)(
- 5)
A. -7
+ 15
B. 
- 5
- 3
+ 15
C. 
- 8
+ 15
D. 
+ 15
Answer: B
Mathematics
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Solve the problem.What is the intensity in watt/m2 of a noise measured at 66 decibels? D = 10 log10(S/S0), where S0 is 10-12 watt/m2. Round to two decimal places when necessary.
A. 7.35 × 1014 watt/m2 B. 3.98 × 10-6 watt/m2 C. 6.6 × 10-10 watt/m2 D. 3.98 × 10-5 watt/m2
Mathematics
Approximate the value using a calculator. Express answer rounded to three decimal places.3.8?
A. 77.476 B. 11.938 C. 36.462 D. 66.289
Mathematics
Solve the system by the Gauss-Jordan method.
?
What will be an ideal response?
Mathematics
From the top of a 250 ft lighthouse, the angle of depression to a ship in the ocean is 18°. How far is the ship from the base of the lighthouse?
(a) 269 ft (b) 769 ft (c) 810 ft (d) 81.4 ft (e) 567.3 ft
Mathematics