What should be changed to make the following sentence true? ""acrophobia is characterized by intense fear

Agoraphobia

Explanation:

Acrophobia is a fear associated with heights i.e. fear of height

while Phobia characterized by intense fear is called Agoraphobia which is a anxiety disorder that can make you feel trapped so "Acrophobia" must be replace with "Agoraphobia" to make the sentence right.          

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

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