The ratio Tim spends on math homework to science homework is 5 to 4. If he spends 40 minutes on math homework, how many minutes does he spend on science homework?

A. 20 Minutes
B. 32 Minutes
C. 60 Minutes
D. 90 Minutes

I think it's either A or B, but I don't know.

2 answers

5/4 = 40/x

Cross multiply and solve for x.
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