A population changes with time. Its level after t years is given by the function 
. After a period of population increase, the population reaches a maximum value. What can be said about 
at this time?
?
A. is positive.
B. is negative.
C. is zero.
D. is linear.
Answer: C
Mathematics
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Find the limit.
A. -? B. 8 C. ? D. Does not exist
Mathematics
A farmer wishes to work out the average milk yield in his herd that consists of an equal number of Ayrshire, Friesian, Galloway, and Jersey cows.Suppose the farmer samples the 12 cows in his barn that are closest to where he enters the barn. What type of sampling is being used?
A. quota sampling B. stratified sampling C. convenience sampling D. simple random sampling E. capture-recapture
Mathematics
Solve the triangle.a = 8, c = 7, B = 90°
A. b = 9.63, A = 41.2°, C = 48.8° B. b = 10.63, A = 41.2°, C = 48.8° C. b = 11.63, A = 48.8°, C = 41.2° D. b = 10.63, A = 48.8°, C = 41.2°
Mathematics
Find the quotient.7 ÷ 0
A. 0 B. undefined C. 7 D. 1
Mathematics