Mathematics, 07.10.2020 23:01 maguilarz2005
A spike is hammered into a train rail. You are standing at the other
end of the rail. You hear the sound of the hammer strike both through
the air and through the rail itself. These sounds arrive at your point
six seconds apart. You know that sound travels through air at 1100
feet per second and through steel at 16,500 feet per second. How far
away is that spike? (Round to one decimal place.)
Answers: 2
Mathematics, 21.06.2019 22:00, dest8860
Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b
Answers: 1
Mathematics, 21.06.2019 22:10, layshjjbradshaw7250
What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²
Answers: 1
A spike is hammered into a train rail. You are standing at the other
end of the rail. You hear the...
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