Idon't understand this question! 19 pts
1.) a projectile launched straight up into the air with an initial velocity of 20 meters per second from a height of 10 meters. how long will it take for the projectile to hit the ground?
a.) which formula should be used?
h(t) = -4.9t² + vot + ho
h(t) = -16t² + vot + ho
b.) what is the vo?
c.) what is the ho?
d.) use the quadratic formula to solve

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

Marco is studying a type of mold that grows at a fast rate. he created the function f(x) = 345(1.30)x to model the number of mold spores per week. what does the 1.30 represent? how many mold spores are there after 4 weeks? round your answer to the nearest whole number. 1.30 represents the number of mold spores marco had at the beginning of the study; 985 mold spores 1.30 represents the number of mold spores grown in a given week; 448 mold spores 1.30 represents the 30% rate of weekly growth; 345 mold spores 1.30 represents the 30% rate of weekly growth; 985 mold spores