May I please receive help?

Change negative exponents to positive. then solve. round to four decimal places

Find the percent error of the measurement 4 cm

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.