Solve the problem.The intensity of light I at time t hours after sunrise and at a depth of x feet below the ocean surface is given by I(x,t) = Ioe-kx sin3
,where D is the length of daylight in hours, Io is the intensity of light on the surface of the water at midday, and k is a positive constant. Assume D = 14, Io = 50, and k = 0.005. In a study of the effect of light on ocean plants, a scientist needs to determine the minimum depth x at which a plant would never at any time be exposed to an intensity of light greater than 25. What is this minimum depth?
A. 108 ft
B. 385 ft
C. 139 ft
D. 65 ft
Answer: C
Mathematics
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Work the application and answer with a complete sentence.Mr. and Mrs. Gutierrez borrow $6900 to buy a new car. The loan is to be paid off in 23 equal monthly payments. How much is each payment?
A. Each payment is $30. B. Each payment is $6877. C. Each payment is $300. D. Each payment is $6923.
Mathematics
Provide an appropriate response.The letters GCD stand for Greatest Common Divisor.
A. True B. False
Mathematics
Solve the given equation by finding the unknown value.94 - 19 = ?
A. 75 B. 70 C. 95 D. 85
Mathematics
Find the zeros of the quadratic function by completing the square. List the x-intercepts of the graph of the function.f(x) = x2 - 
x - 
A. x = 
, x = 
B. x = 
, x = - 
C. x = - 
, x = - 
D. x = - 
, x = 
Mathematics