Solve the problem.
-The time $T$ necessary to make an enlargement of a photo negative varies directly as the area $A$ of the enlargement. If 140 seconds are required to make a 5- by-7 enlargement, find the time required for a 7- by-9 enlargement.
A) $315 \mathrm{sec}$
B) $189 \mathrm{sec}$
C) $378 \mathrm{sec}$
D) $252 \mathrm{sec}$

Question

Quizplus · Accepted Answer

The Answer of Solve the problem.
-The time $T$ necessary to make an enlargement of a photo negative varies directly as the area $A$ of the enlargement. If 140 seconds are required to make a 5- by-7 enlargement, find the time required for a 7- by-9 enlargement.
A) $315 \mathrm{sec}$
B) $189 \mathrm{sec}$
C) $378 \mathrm{sec}$
D) $252 \mathrm{sec}$

Solve the Problem TTT Necessary to Make an Enlargement of a Photo Negative Varies

Solve the Problem $T$ Necessary to Make an Enlargement of a Photo Negative Varies