Solve the equation for the indicated variable.d = rt
for r
A. r = 
B. r = 
C. r = dt
D. r = d - t
Answer: B
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Solve the problem.In a Psychology class, the students were tested at the end of the course on a final exam. Then they were retested with an equivalent test at subsequent time intervals. Their average scores after t months are given in the table.
Using a graphing utility, fit a logarithmic function y = a + b ln x to the data. Using the function you found, estimate how long will it take for the test scores to fall below 84%. Express your answer to the nearest month.
A. 12 months B. 20 months C. 8 months D. 10 months
Use the leading coefficient test to determine whether y?? or y?-? as
y = 5x6 - x5 + 6x2 - 1
A. -? B. ?
Write an algebraic equation and use it to solve the problem.A beverage wholesaler wants to create a new punch. He will mix fruit juice worth $2 a gallon and rum worth $7 a gallon. He wants to obtain 140 gallons worth of punch worth $4 a gallon. How much of each beverage should he use?
A. He should mix 112 gallons of juice with 28 gallons of rum. B. He should mix 126.0 gallons of juice with 14.0 gallons of rum. C. He should mix 84 gallons of juice with 56 gallons of rum. D. He should mix 98.0 gallons of juice with 42.0 gallons of rum.
Find 1.75% of 2700.
A. 4725 B. 1.4725 C. 47.25 D. 472.5