exam Maths Puzzle Numerical Ability

The volume V of a given mass of gas varies directly as the temp T and inversely as the pressure P. If V=161.0in cubed when T=230 degrees and P= 20 lbs/in squared, what is the volume when T=390 degrees and P=20 lbs/in squared?

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exam Other Question

Cordless Telephones.
Virginia's AT&T 9002 cordless phone has a range of 1000ft. Her apartment is a corner unit, located as shown in the figure below. Will Virginia be able to use perform the indicated calculation. write your result in scientific notation.

(6*10^12)(3.2*10^8)/(1.6*10^7(3*10^2)