Earth has a radius of about 6.4 x 10^6m. approximate the surface area of earth using the formula for the surface area of a sphere. s=4*pi*r^2

The product of two negative rational numbers is always zero sometimes zero never zero

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

Consider a bag that contains 220 coins of which 6 are rare indian pennies. for the given pair of events a and b, complete parts (a) and (b) below. a: when one of the 220 coins is randomly selected, it is one of the 6 indian pennies. b: when another one of the 220 coins is randomly selected (with replacement), it is also one of the 6 indian pennies. a. determine whether events a and b are independent or dependent. b. find p(a and b), the probability that events a and b both occur.