Which of the following is a geometric sequence?
a. 1, 1, 2, 3, 5,
b. 1, 1/2, 1/4, 1/8,
c. 7, 4, 1, -2,
d. 2, 4, 6, 8,

Construct the graph that models the given situation

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account.write an expression to represent the total amount in his savings account.