Insert the indicated number of arithmetic means between the given first and last terms of an arithmetic sequence.
1. 2 and 32 [1]
2. 6 and 54 [3]
3. 68 and 3 [4]
4. 10and 40 [5]
5. 1⁄2 and 2 [2]

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog