Solve the problem.Use the formula N = Iekt, where N is the number of items in terms of the initial population I, at time t, and k is the growth constant equal to the percent of growth per unit of time. There are currently 60 million cars in a certain country, decreasing by 5.1% annually. How many years will it take for this country to have 50 million cars? Round to the nearest year.
A. 45 years
B. 10 years
C. 4 years
D. 2 years
Answer: C
Mathematics
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Solve.A layer of dirt must be spread over a circular area 13.5 feet in diameter. How deep a layer will be obtained using 75 cubic feet of dirt? Round to the nearest tenth.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Solve the equation for the specified variable.A = 
h(B + b) for b
A. b = 2A - Bh
B. b = 
C. b = 
D. b = 
Mathematics
Write a numerical expression for the phrase and simplify it.The product of -5 and 9, subtracted from -1
A. -1 + (-5)(9); -46 B. [-1 - (-5)](9); 36 C. -1 - (-5)(9); 44 D. (-1)(-5)(9); 45
Mathematics
Use the product rule to simplify the expression.
A. 5
B. 2
C. 2
D. 
Mathematics