Question

x=3y/7
y=126 correct to 3 significant figures.
z=12.4 correct to 1 decimal place.
Work out the upper bound for the value of x.Give your answer correct to 3 decimal places when appropriate.

Answer 1

$\cos( {19 + 02 \div \geqslant 346 |15)21| }^{?} )$

this is the answer