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Lesson: 1.5 Rounding and Estimating with ...
YIANDRA DIAZ OLEA
Question 12 of 15, Step 1 of 1
13/22
Correct
A total of 33 microphones are to be purchased. Each microphone costs $347. Estimate the total purchase price by using rounded numbers.
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work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

a. vertically

explanation:

i tried it and took the test

if im wrong then we have different tests