You have a set of calipers that can measure thicknesses of a few inches with an uncertainty of ±0.005 inches. You measure the thickness of a deck of 52 cards and get 0.535
inches:
If you now calculate the thickness of 1 card, what is your answer, including its
uncertainty?
You can improve this result by measuring several decks together. If you want to
know the thickness of 1 card with an uncertainty of only 0.00002 in., how many
decks do you need to measure together?

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

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.