This is similar to Try It #9 in the OpenStax text.

In central pivot irrigation, a large irrigation pipe on wheels rotates around a center point. A farmer has a central pivot system with a radius of 380meters. If water restrictions only allow her to water 160thousand square meters a day, what angle should she set the system to cover?

Write the answer in radian measure to two decimal places.

= radians

(please I need this in simple plain text math and I do not know how to put the +and - and the same time , help pls!! )