Sam worked on his science fair project for 1/4 hour on Friday and

1/2 hour on Saturday.

What are four common denominators, which are less than 20, for the fractions?

Hassan bought a package of tofu. the temperature of the tofu was 14° celsius when hassan put the package into the freezer. he left the tofu in the freezer until it reached –19° celsius. which expressions explain how to find the change in temperature, in degrees celsius, of the package of tofu? select three that apply.