Answer:
Subtract the post-discount price from the pre-discount price.
Divide this new number by the pre-discount price.
Multiply the resultant number by 100.
Step-by-step explanation:
2 surfaces are 6 in by 9 in, meaning that their combined area is 2(54 in^2).
2 surfaces are 6 in by 18 in; combined area is 2(108 in^2).
2 surfaces are 9 in by 18 in; combined area is 2(162 in^2).
Add up these areas: A = 2(54+108+162) in^2 = 648 in^2 (answer)
We need to finish writing out the problem using what we know about the distance both planes traveled.
Plane 1 - 1050 miles - 300 mph - ? time
Plane 2 - 1050 miles - same time as Plane 1 less 1.75 hours.
Let's fill in the gaps.
Plane 1 - ? time 1050/300 = 3.5 hours
Plane 2 - ? time Take 3.5 hours and subtract 1.75 = 1.75 hours
Now we figure the speed of plane 2
1050/1.75 = 600 miles an hour
Another quick way was to note that 1.75 was half of 3.5 hours so the speed was 2x as fast!
2.28 x 10^8 = 228,000,000
1.6808 x 10^6 / 4.4 x 10^3 = 1,680,800/ 4,400 = 382
Step-by-step explanation:
C IS THE ANSWER!
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