Randi estimates the sum of 6.8 x 5.2 as 11. Is this a reasonable estimate? Why?

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

Is a square always, sometimes, or never a parallelogram

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?