If i go to sleep at 10: 30, how many hours of sleep will i get if i wake up at 5: 00 in the morning?

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base