Question

evaluate 70/root 10 +root 20 +root 40-root 80 if root 10 =3.16 and root 5=2.24

Answer 1

$70 \div \sqrt{10} + \sqrt{20} + \sqrt{40} + \sqrt{80}$
$70 \div 3.16 + \sqrt{4 \times 5} + \sqrt{4 \times 10} + \sqrt{16 \times 5}$
$70 \div 3.16 + 2 \sqrt{5} + 2 \sqrt{10 } - 4 \sqrt{5}$
70÷3.16+2*2.24+2*3.16-4*2.24
70÷3.16+4.48+6.32-8.96
70÷5
14