Write a general formula to describe the variation.The safety load ? of a beam with a rectangular cross section that is supported at each end varies directly as the product of the width W and the square of the depth D and inversely as the length L of the beam between the supports.
A. ? = 
B. ? = 
C. ? = 
D. ? = 
Answer: B
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Add the numbers using the number line.-3 + 0 
A. 0 B. 3 C. -3 D. -30
Use a calculator to find the value for 
to four decimal places.
?
A. 0.2084 B. -0.7916 C. 0.7916 D. -1.8228 E. -0.2084
bacteria culture is experiencing a growth pattern of 15% per hour in its population P; that is dP / dt = 0.15P, where P is the population of the culture and t is the time, in hours, from noon.
(a) Given that the town’s population at noon was 8000, find the solution of the equation assuming P0 = 8000 and k = 0.15 . 32. (b) What will the population be at 5 pm?
Solve the problem.Among first-year students enrolled in a two-year program at a trade school, the following was determined to be true: 74% would successfully complete the year and go on to the second year; 20% would repeat the year; and 6% would drop out of the program. Among the second-year students, 75% would successfully complete the year and graduate; 15% would repeat the year; and 10% would drop out of the program. What is the expected number of years that the average first-year student will spend in the program? Round your answer to the nearest hundredth.
A. 2.49 years B. 2.34 years C. 2.56 years D. 2.41 years