Timothy has hired Cynthia and Dominic to cover the roof with shingles. Dominic can install 180 shingles in the same time it takes Cynthia to install 150 shingles,
which can be shown using the following relationship where d and C are the
respective rates for Dominic and Cynthia:
180 150
d
Also, Dominic can install 10 shingles more per hour than Cynthia.
How many shingles can Cynthia install per hour?
a.) 40 shingles per hour
o b.) 50 shingles per hour
c.) 60 shingles per hour
d.) 70 shingles per hour
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