Some chemical formulas contain parentheses. When counting atoms, multiply everything inside the paren- theses by the subscript. For example, Ca(NO3)2 has one calcium atom, two (2 X 1) nitrogen atoms, and six (2 X 3) oxygen atoms. Find the number of atoms of each element in the formu- las Mg(OH)2 and Al2(SO4)3. Record your work in your Science Journal.​

Ten times the square of a non-zero number is eqaul to ninety times the number

The wheels of a bicycle have a diameter of 70cm. how many meters will the bicycle travel if each wheel makes 50 revolutions

Ican interpret and represent the remainder in division calculations sensibly for the context (eg if we wont to know how many 40 seat buses will be needed to transport 170 students for on excursion, we divide 170 by 40 and realise buses and another smaller vehicle to that we need 4 transport 10 more students) solve the following questions. show your work! 11) the zoo had 420 butterflies that needed to be transported to a new enclosure. the boxes that the butterflies would be moved in only hold 80 butterflies in each. how many boxes would they need? 2 12) each classroom in the school can have exactly 25 students, if there are 345 students in the school how many full classrooms are there?