A rock is thrown 0.8 meters into the air. Find how fast it was thrown.

3.96 m/s

Explanation:

Given

Rock is thrown to a height of 0.8 m

We know that energy is conserved

Total Energy=kinetic Energy+Potential Energy

At bottom Kinetic Energy is maximum and Potential energy is minimum while at the top potential Energy is maximum and kinetic energy is minimum

Energy at Bottom

Energy at Top

Thus

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50