Suppose a deposit of $ 2,000 in a savings account that paid an annual interest rate r (compounded yearly) is worth $ 2,234 after 2 years. Using the formula A = P ( 1 + r ) t , we have 2 , 234 = 2 , 000 ( 1 + r ) 2 Solve for r to find the annual interest rate (to the nearest tenth).

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

Amanager recorded the number of bicycles sold by his company each quarter. his projected sales after t years is given by the expression below. which of the following statements best describes the expression? a. the initial sales of 575 bicycles increases at the rate of 4% over 4 quarters. b. the initial sales of 575 bicycles increases at the rate of 18% over 4 years. c. the initial sales of 575 bicycles increases at the rate of 4% over t quarters. d. the initial sales of 575 bicycles increases at the rate of 18% over t years.

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle