Solve the problem.A conservation officer needs to know the width of a river in order to set instruments correctly for a study of pollutants in the river. From point A, the conservation officer walks 90 feet downstream and sights point B on the opposite bank to determine that ? = 60° (see figure). How wide is the river?
A. 180 ft
B. 156 ft
C. 78 ft
D. 52 ft
Answer: B
Mathematics
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Determine whether the expression shown is a sum, difference, product, or quotient.3 × 2
A. product B. sum C. difference D. quotient
Mathematics
Solve the problem.The number of bacteria growing in an incubation culture increases with time according to 
where x is time in days. Find the number of bacteria when x = 0 and x = 2.
A. 29,200, 116,800 B. 7300, 58,400 C. 7300, 1,868,800 D. 7300, 116,800
Mathematics
Find the indicated function value.Find f(4) when f(x) = 5x2 + 2x + 2.
A. 90 B. 74 C. 26 D. 86
Mathematics
Solve and check your solution(s). If the equation has no real solution, so state.
= 2
A. - 
B. - 
C. - 1
D. no real solution
Mathematics