Atree casts a shadow 10 ft long. a boy standing next to the tree casts a shadow 2.5 ft long. the triangle shown for the tree and its shadow is similar to the triangle shown for the boy and his shadow. if the boy is 5 ft tall, how tall is the tree?

a. 18 ft
b. 12.5 ft
c. 15 ft
d. 20 ft

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?