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The charge C of a cell phone company is partly constant and partly varies as...

The charge C of a cell phone company is partly constant and partly varies as the number of units of call, U. The cost of 90units is 1120 and the cost of 120units is 1216.
a. Find a formula which connects C and U
b. Find C when U=150units.?
In Mathematics
1 Answers Available
Asked by Optimistic on 20th June, 2020
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