Afire engine is rapidly approaching you at a stop light. what happens to the frequency and pitch of the sound as the fire engine draws closer? the frequency increases, and the pitch decreases the frequency increases, and the pitch increases the frequency decreases, and the pitch decreases the frequency decreases, and the pitch increases

the answer is b, have negligible mass

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2