Question

Alessandra is raising turtles and must keep the air temperature in their enclosure at 23° C, with a relative error less than 4%. Write an absolute value inequality for

the actual temperature. Find the interval in which the actual temperature must lie.

Answer 1

`\\ \sf\longmapsto 23°C\pm 4\%\;of\:23=T`

`\\ \sf\longmapsto 23°C\pm (4)/(100)(23)=T`

`\\ \sf\longmapsto 23°C\pm 0.04(23)=T`

`\\ \sf\longmapsto 23°C\pm 0.92=T`

T is the actual temperature