Asquare patio has an area of area of 200 square feet. how long is each side of the patio to the nearest 0.05?

Can someone check my answer? you : )

Astore has apples on sale for three dollars or 2 pounds how many pounds of apples can you buy for nine dollars if an apple is approximately 5 ounces how many apples can you buy for nine dollars

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries