Question

Women’s records in the women’s 1500-m run. The formula R =−0.0026? + 4.0807 can be used to predict the world record, in minutes, for the 1500-m run t years after 1900. Determine (in terms of an inequality) those years for which the world record will be less than 3.8 min.

Answer 1

Set the equation less than 3.8. I'm imagining you mean:
\[-0.0026t + 4.0807 < 3.8\]

Answer 2

I'm thinking the question mark mean t