There are 20 black cell phones and 30 white cell phones in a store. An employee takes 10 phones at random. Find the probability that A. there will be exactly 4 black cell phones among the chosen phones; B. there will be less than 3 black cell phones among the chosen phones.

The graph shows the amount of money noah earned based on the number of lawns he cut. which list shows the dependent quantities in the graph?

Brittany has designed four different birdcages, each with the same volume: a square pyramid, a cylinder, a cone, and a sphere. the zoo wants to use one of brittany’s designs but plans to change the volume of the cage. find the design change that would result in the birdcage with the greatest volume. a.) increase the area of the base of the square pyramid by a factor of ten. b.) increase the height of the cylinder by a factor of ten. c.) increase the radius of the cone by a factor of ten. d.) increase the radius of a sphere by a factor of ten.

12 3 4 5 6 7 8 9 10 time remaining 42: 01 ryan gathered data about the age of the different dogs in his neighborhood and the length of their tails. which best describes the strength of the correlation, and what is true about the causation between the variables?