Which notation expresses the number of permutations of 9 items taken 8 at a time?

How many 3/8s are in 6 plz someone tell me now

The longer leg of a 30-60-90 trangle is 18

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.