The table shown below gives the approximate number of pieces of mail handled by the united states postal service for different years.
how many more pieces of mail were handled by the united states postal service in 199519951995 than in 196519651965?
express your answer in scientific notation.
year approximate number of pieces of mail handled
195019501950 4.5 \cdot 10^{10}4.5⋅10
10
4, point, 5, dot, 10, start superscript, 10, end superscript
196519651965 7.2 \cdot 10^{10}7.2⋅10
10
7, point, 2, dot, 10, start superscript, 10, end superscript
198019801980 1.0 \cdot 10^{11}1.0⋅10
11
1, point, 0, dot, 10, start superscript, 11, end superscript
199519951995 1.8 \cdot 10^{11}1.8⋅10
11
1, point, 8, dot, 10, start superscript, 11, end superscript
201020102010 1.7 \cdot 10^{11}1.7⋅10
11

2 & 7

step-by-step explanation:

he climbs 300 ft/hr at a constant rate. the peak is at 1,500 ft.

when going up, he reaches 600 ft in 2 hours. remember, that he is going in a constant rate. divide 600 with 300:

600/300 = 2

assuming that he takes the same route back (meaning that it's a 1500 ft route back, you can solve.

note also that you are solving when he gets back to 600 ft after he reaches the peak.

first, find the amount of hours it takes to get up the peak. divide the total amount (1500), with the ft/her (300) to get the amount of hours (x):

1500/300 = x

x = 5

it takes jamie 5 hours to get up. now, he is returning down, and reaches 600 (his current destination). remember that he climbs at a constant 300 ft/hr. divide 600 with 300:

600/300 = x

x = 2

now add the two numbers together.

x = 5 + 2 = 7

jamie takes 7 hours to go up the mountain and reach his current position when descending.

(total amount/constant rate) = (time).

remember that it is a constant rate, so in total, when he gets back down the mountain, it will take the same amount of time as when he goes up. the total amount for the round trip is: 5 + 5 = 10.

~

s

step-by-step explanation:

the argument of alfred t. mahan, henry cabot lodge, and albert j. beveridge was the economically and mass production the the americans could not consume themselves. this led expansion to sell to other foreign nations for profits.

step-by-step explanation:

this is my explanation