A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 45 cm/s. Express the radius r of this circle as a function of the time t (in seconds) and find A ? r, if A is the area of this circle as a function of the radius.
What will be an ideal response?
r(t) = 45t, 2025?t2
Mathematics
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Solve the formula for the specified variable.A = P + Pr; for P
A. P = 
B. P = A - Pr
C. P = A - r - 1
D. P = 
Mathematics
Solve the problem.The table shows the population of a city over the past five years.
We used these data to develop the quadratic equation 
, which models the population of the city y in millions in the year x, where x = 0 represents 1995, x = 1 represents 1996, and so on. Use the model to find the estimated population in the year 1998.
A. 71,628,000 B. 68,852,000 C. 1,490,000 D. 1,490,000,000,000
Mathematics
Use the distributive property to simplify.- (-7m + 7n - 7p)
A. -7m + 7n - 7p B. 7m - 7n + 7p C. -7m + 7n + 7p D. 7m - 7n - 7p
Mathematics
Determine whether the graph is the graph of a function.
A. Yes B. No
Mathematics