Express as a ordinary numerals
(a)2×7
(b)4×10​

An arrow is shot vertically upward at a rate of 180ft/s. use the projectile formula h=−16t2+v0t to determine at what time(s), in seconds, the arrow is at a height of 420ft. round your answer(s) to the nearest tenth of a second.

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

4+(2+x) can you me solve this problem