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Mathematics, 01.11.2019 01:31 rothermelm

For every 40 phone calls that jess made in a month, she received 70 phone calls. what is the ratio in simplest form of the number of phone calls made to the number of phone calls received by jess that month?

a 3: 4
b 4: 3
c 7: 4
d 4: 7

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