Stephen buys x pencils and y notebooks for his students. each pencil costs $0.45 and each notebook costs $1.25. he buys a total of 210 pencils and notebooks for $142.50. how many pencils does stephen buy? enter you answer below.

Anewborn baby had about 26,000,000,000 cells. an adult has about 4.94 times 10 to the 13 power cells. how many times as many cells does an adult have than a newborn

In the film, zeke the zombie slayer versus the zombies from space, zeke slayed 140 zombies. in the sequel, zeke the zombie slayer versus the zombies from space, part 2, he slayed 5% more zombies. how many zombies were slain by zeke in the sequel?

What is the volume of a cone with a height of 6 cm in the radius of 2 cm