What is a reasonable estimate for the product of 43×68

Roger could feed 5 walruses with 4 kilograms of fish. how many walruses could he feed with 7.2 kilograms of fish?

Is the response to the survey question "did you smoke in the last week question mark "response to the survey question "did you smoke in the last week? " a discrete random variable, a continuous random variable, or not a random variable?

Rewrite the expression in z to the n power. the expression i was given is: 1 over z to the negative 1 half power.