What is the area of the top surface of a circular manhole cover that has a radius of 30cm

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities

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.

Ab and bc form a right angle at point b. if a= (-3, -1) and b = (4.4), what is the equation of bc?