Write the equation of the circle with center (2, -3) and a radius of 4.
a) (x + 2)^2 + (y - 3)^2 = 4
b) (x - 2)^2 + (y + 3)^2 = 4
c) (x + 2)^2 + (y - 3)^2 = 16
d) (x - 2)^2 + (y + 3)^2 = 16

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

The product of sin 30 degrees and sin 60 degrees is same as the product of

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?