Harrison sends an e-mail to his boss. harrison expects a response within five minutes, but he can’t himself and checks every 30 seconds. after five minutes, a replying e-mail is delivered just as he expected. which of the following statements is true? a. harrison is on a fixed-interval schedule of reinforcement. b. harrison is on a variable-interval schedule of reinforcement. c. harrison is on a fixed-ratio schedule of reinforcement. d. harrison is on a variable-ratio schedule of reinforcement.

Determine whether the following symbols are universal or contextual

Deshawn is writing an informative essay about volcanoes. he has gathered facts and written a thesis statement. read his thesis below: a volcano eruption impacts the environment in a number of ways, from covering everything in ash to destroying the landscape. based on this thesis, how should deshawn organize his essay? ? a. he should use cause/effect, writing one paragraph that explains the link between the cause of a volcano and its effects. b. he should use comparison/contrast, writing one body paragraph describing how volcanoes impact the environment and one paragraph describing how earthquakes impact the environment. c. he should use comparison/contrast, writing one body paragraph looking at the similarities between the effects of ash and the destruction of the landscape, and one paragraph explaining the differences. d. he should use cause/effect, writing one paragraph that explains how volcanoes create ash and destruction, and one paragraph explaining each of the volcano’s effects, the ash and the destruction of landscape, in detail.

As sentenças a seguir trazem a mesma situação: a entrada de animais. leia: i – é proibido entrada de animais. ii – é proibida a entrada de animais. iii – é proibida entrada de animais. assinale a alternativa correta em que indica o uso correto do artigo nas sentenças: escolha uma: a. as sentenças i, ii e iii estão corretas. b. as sentenças i e iii estão corretas. c. as sentenças i e ii estão corretas. d. somente a sentença i está correta. e. as sentenças ii e iii estão corretas.