The free trade agreement signed in 1988 called for

a. eliminating taxes on imported goods

b. building more border fencing

c. establishing customs fees

d. establishing cultural links

an angle + its complement = 90 degrees

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.