Os números -2 e - 1 ocupam na rede numérica abaixo as posições indicadas, respectivamente, por quais letras?​

All of the following are examples of service-learning opportunities except: a. donating time to senior citizen war veterans and writing a report about the experience for your u. s. history class. b. getting a part-time job at a habitat restoration center. c. reading to second-grade students as part of your assigned reading time for your english class. d. planting trees in your community and then discussing global warming in your science class.

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Did the universe cool off or get hotter as it expanded after the 'big bang"?