If two coins are tossed at the same time, what are all the possible outcomes? (for example, ht means getting heads on the first coin and tails on the second.)
a.
{ht, th, tt}
b.
{hh, ht, tt}
c.
{hh, ht, th, tt}
d.
{hh, tt}

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.

This figure consists of a rectangle and semicircle. what is the perimeter of this figure use 3.14 for pi 60.84m 72.84m 79.68m 98.52m

Ten times the square of a non-zero number is eqaul to ninety times the number